Approaching the ultimate superconducting properties of (Ba,K)Fe2As2 by naturally formed low-angle grain boundary networks
The most effective way to enhance the dissipation-free supercurrent in the presence of a magnetic field for type II superconductors is to introduce defects that act as artificial pinning centers (APCs) for vortices. For instance, the in-field critical current density of doped BaFe 2 As 2 (Ba122), on...
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| creator | Iida, Kazumasa Qin, Dongyi Tarantini, Chiara Hatano, Takafumi Wang, Chao Guo, Zimeng Gao, Hongye Saito, Hikaru Hata, Satoshi Naito, Michio Yamamoto, Akiyasu |
| description | The most effective way to enhance the dissipation-free supercurrent in the presence of a magnetic field for type II superconductors is to introduce defects that act as artificial pinning centers (APCs) for vortices. For instance, the in-field critical current density of doped BaFe
2
As
2
(Ba122), one of the most technologically important Fe-based superconductors, has been improved over the last decade by APCs created by ion irradiation. The technique of ion irradiation has been commonly implemented to determine the ultimate superconducting properties. However, this method is rather complicated and expensive. Here, we report a surprisingly high critical current density and strong pinning efficiency close to the crystallographic
c
-axis for a K-doped Ba122 epitaxial thin film without APCs, achieving performance comparable to ion-irradiated K-doped Ba122 single crystals. Microstructural analysis reveals that the film is composed of columnar grains with widths of approximately 30–60 nm. The grains are rotated around the
b
- (or
a
-) axis by 1.5° and around the
c
-axis by −1°, resulting in the formation of low-angle grain boundary networks. This study demonstrates that the upper limit of in-field properties reached in ion-irradiated K-doped Ba122 is achievable by grain boundary engineering, which is a simple and industrially scalable manner.
Superconductivity: Engineering crytal structure
A way to optimize superconductivity by carefully controlling the atomic-level crystal structure has been developed by scientists in Japan and the USA. Superconductivity is a quantum effect, usually only seen at very low temperatures, in which an electrical current can pass through a material without facing any resistance. One approach to increasing the operating temperature is to intentionally introduce atomic-level defects using a technique called ion irradiation but this is technically complicated and expensive. Kazumasa Iida from Nagoya University, Japan, and co-workers have managed to achieve the levels of superconductivity associated with ion irradiation by using so-called grain boundary engineering. Regions of different crystalline orientation are known as grains. The team showed that by controlling the alignment of these grains during synthesis of the superconductor (Ba,K)Fe
2
As
2
, they could maximize the material’s superconductivity.
High critical current density and strong pinning efficiency for Fe-based superconductor, K-doped BaFe
2
As
2
, were achieved by natural |
| doi_str_mv | 10.1038/s41427-021-00337-5 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_osti_</sourceid><recordid>TN_cdi_proquest_journals_2584146618</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2584146618</sourcerecordid><originalsourceid>FETCH-LOGICAL-c456t-c756b8ba93c5d9d09d442e7ecc85eea627ecb8100767595cc9f1f2de595ebe943</originalsourceid><addsrcrecordid>eNp9kUFPxCAQhRujiWb1D3gietHEKlBo4bhuXDVu4kXPhNLpbrULK9CY_fey1ujN07wM35sw87LslOBrggtxExhhtMoxJTnGRVHlfC87IkKwnGFe7f9qJg-zkxDeMMakLJng7CjbTjcb77RZdXaJ4grQ0MdurSOgMGzAG2ebwcTdY8JSI3YQkGvRxa2-erqcA50GiuotsjoOXvf9FrXOr6FBvfvMtV32gJZedxbVbrCN9omE-On8ezjODlrdBzj5qZPsdX73MnvIF8_3j7PpIjeMlzE3FS9rUWtZGN7IBsuGMQoVGCM4gC5pkrUgGFdlxSU3RrakpQ0kDTVIVkyys3GuC7FTwXQRzCrtZcFERQSVrJIJOh-htOXHACGqNzd4m_6lKBfpvmVJRKLoSBnvQvDQqo1Px_JbRbDaRaHGKFSKQn1HoXgyFaMpJNguwf-N_sf1BYnBjT0</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2584146618</pqid></control><display><type>article</type><title>Approaching the ultimate superconducting properties of (Ba,K)Fe2As2 by naturally formed low-angle grain boundary networks</title><source>Nature Free</source><source>DOAJ Directory of Open Access Journals</source><source>EZB-FREE-00999 freely available EZB journals</source><source>Free Full-Text Journals in Chemistry</source><source>Springer Nature OA Free Journals</source><creator>Iida, Kazumasa ; Qin, Dongyi ; Tarantini, Chiara ; Hatano, Takafumi ; Wang, Chao ; Guo, Zimeng ; Gao, Hongye ; Saito, Hikaru ; Hata, Satoshi ; Naito, Michio ; Yamamoto, Akiyasu</creator><creatorcontrib>Iida, Kazumasa ; Qin, Dongyi ; Tarantini, Chiara ; Hatano, Takafumi ; Wang, Chao ; Guo, Zimeng ; Gao, Hongye ; Saito, Hikaru ; Hata, Satoshi ; Naito, Michio ; Yamamoto, Akiyasu ; Florida State Univ., Tallahassee, FL (United States)</creatorcontrib><description>The most effective way to enhance the dissipation-free supercurrent in the presence of a magnetic field for type II superconductors is to introduce defects that act as artificial pinning centers (APCs) for vortices. For instance, the in-field critical current density of doped BaFe
2
As
2
(Ba122), one of the most technologically important Fe-based superconductors, has been improved over the last decade by APCs created by ion irradiation. The technique of ion irradiation has been commonly implemented to determine the ultimate superconducting properties. However, this method is rather complicated and expensive. Here, we report a surprisingly high critical current density and strong pinning efficiency close to the crystallographic
c
-axis for a K-doped Ba122 epitaxial thin film without APCs, achieving performance comparable to ion-irradiated K-doped Ba122 single crystals. Microstructural analysis reveals that the film is composed of columnar grains with widths of approximately 30–60 nm. The grains are rotated around the
b
- (or
a
-) axis by 1.5° and around the
c
-axis by −1°, resulting in the formation of low-angle grain boundary networks. This study demonstrates that the upper limit of in-field properties reached in ion-irradiated K-doped Ba122 is achievable by grain boundary engineering, which is a simple and industrially scalable manner.
Superconductivity: Engineering crytal structure
A way to optimize superconductivity by carefully controlling the atomic-level crystal structure has been developed by scientists in Japan and the USA. Superconductivity is a quantum effect, usually only seen at very low temperatures, in which an electrical current can pass through a material without facing any resistance. One approach to increasing the operating temperature is to intentionally introduce atomic-level defects using a technique called ion irradiation but this is technically complicated and expensive. Kazumasa Iida from Nagoya University, Japan, and co-workers have managed to achieve the levels of superconductivity associated with ion irradiation by using so-called grain boundary engineering. Regions of different crystalline orientation are known as grains. The team showed that by controlling the alignment of these grains during synthesis of the superconductor (Ba,K)Fe
2
As
2
, they could maximize the material’s superconductivity.
High critical current density and strong pinning efficiency for Fe-based superconductor, K-doped BaFe
2
As
2
, were achieved by naturally formed low-angle grain boundary networks. K-doped BaFe
2
As
2
thin film is composed of columnar grains with widths of approximately 30–60 nm. The grains are rotated around the
b
- (or
a
-) axis by 1.5° and around the
c
-axis by −1°, resulting in the formation of low-angle grain boundary networks. The achieving superconducting properties are almost 10 times as high as the K-doped BaFe
2
As
2
single crystal and comparable to ion-irradiated single crystal.</description><identifier>ISSN: 1884-4049</identifier><identifier>EISSN: 1884-4057</identifier><identifier>DOI: 10.1038/s41427-021-00337-5</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>639/301/119/1003 ; 639/301/299 ; Atomic structure ; Biomaterials ; Chemistry and Materials Science ; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ; critical current ; Critical current density ; Crystal defects ; Crystal structure ; Crystallography ; Energy Systems ; Fe-based superconductors ; Grain boundaries ; Hc2 ; Ion irradiation ; Jc ; Low temperature ; low-angle grain boundary ; materials for energy and catalysis ; MATERIALS SCIENCE ; Microstructural analysis ; Operating temperature ; Optical and Electronic Materials ; Pinning ; Single crystals ; Structural Materials ; superconducting properties and materials ; Superconductivity ; Superconductors ; Surface and Interface Science ; Thin Films ; upper critical field</subject><ispartof>NPG Asia Materials, 2021-10, Vol.13 (1), Article 68</ispartof><rights>The Author(s) 2021</rights><rights>The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c456t-c756b8ba93c5d9d09d442e7ecc85eea627ecb8100767595cc9f1f2de595ebe943</citedby><cites>FETCH-LOGICAL-c456t-c756b8ba93c5d9d09d442e7ecc85eea627ecb8100767595cc9f1f2de595ebe943</cites><orcidid>0000-0003-1038-9630 ; 0000-0002-3314-5906 ; 0000-0003-1332-2589 ; 0000000233145906 ; 0000000310389630 ; 0000000313322589</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1038/s41427-021-00337-5$$EPDF$$P50$$Gspringer$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://doi.org/10.1038/s41427-021-00337-5$$EHTML$$P50$$Gspringer$$Hfree_for_read</linktohtml><link.rule.ids>230,314,776,780,860,881,27901,27902,41096,42165,51551</link.rule.ids><backlink>$$Uhttps://www.osti.gov/servlets/purl/1829479$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Iida, Kazumasa</creatorcontrib><creatorcontrib>Qin, Dongyi</creatorcontrib><creatorcontrib>Tarantini, Chiara</creatorcontrib><creatorcontrib>Hatano, Takafumi</creatorcontrib><creatorcontrib>Wang, Chao</creatorcontrib><creatorcontrib>Guo, Zimeng</creatorcontrib><creatorcontrib>Gao, Hongye</creatorcontrib><creatorcontrib>Saito, Hikaru</creatorcontrib><creatorcontrib>Hata, Satoshi</creatorcontrib><creatorcontrib>Naito, Michio</creatorcontrib><creatorcontrib>Yamamoto, Akiyasu</creatorcontrib><creatorcontrib>Florida State Univ., Tallahassee, FL (United States)</creatorcontrib><title>Approaching the ultimate superconducting properties of (Ba,K)Fe2As2 by naturally formed low-angle grain boundary networks</title><title>NPG Asia Materials</title><addtitle>NPG Asia Mater</addtitle><description>The most effective way to enhance the dissipation-free supercurrent in the presence of a magnetic field for type II superconductors is to introduce defects that act as artificial pinning centers (APCs) for vortices. For instance, the in-field critical current density of doped BaFe
2
As
2
(Ba122), one of the most technologically important Fe-based superconductors, has been improved over the last decade by APCs created by ion irradiation. The technique of ion irradiation has been commonly implemented to determine the ultimate superconducting properties. However, this method is rather complicated and expensive. Here, we report a surprisingly high critical current density and strong pinning efficiency close to the crystallographic
c
-axis for a K-doped Ba122 epitaxial thin film without APCs, achieving performance comparable to ion-irradiated K-doped Ba122 single crystals. Microstructural analysis reveals that the film is composed of columnar grains with widths of approximately 30–60 nm. The grains are rotated around the
b
- (or
a
-) axis by 1.5° and around the
c
-axis by −1°, resulting in the formation of low-angle grain boundary networks. This study demonstrates that the upper limit of in-field properties reached in ion-irradiated K-doped Ba122 is achievable by grain boundary engineering, which is a simple and industrially scalable manner.
Superconductivity: Engineering crytal structure
A way to optimize superconductivity by carefully controlling the atomic-level crystal structure has been developed by scientists in Japan and the USA. Superconductivity is a quantum effect, usually only seen at very low temperatures, in which an electrical current can pass through a material without facing any resistance. One approach to increasing the operating temperature is to intentionally introduce atomic-level defects using a technique called ion irradiation but this is technically complicated and expensive. Kazumasa Iida from Nagoya University, Japan, and co-workers have managed to achieve the levels of superconductivity associated with ion irradiation by using so-called grain boundary engineering. Regions of different crystalline orientation are known as grains. The team showed that by controlling the alignment of these grains during synthesis of the superconductor (Ba,K)Fe
2
As
2
, they could maximize the material’s superconductivity.
High critical current density and strong pinning efficiency for Fe-based superconductor, K-doped BaFe
2
As
2
, were achieved by naturally formed low-angle grain boundary networks. K-doped BaFe
2
As
2
thin film is composed of columnar grains with widths of approximately 30–60 nm. The grains are rotated around the
b
- (or
a
-) axis by 1.5° and around the
c
-axis by −1°, resulting in the formation of low-angle grain boundary networks. The achieving superconducting properties are almost 10 times as high as the K-doped BaFe
2
As
2
single crystal and comparable to ion-irradiated single crystal.</description><subject>639/301/119/1003</subject><subject>639/301/299</subject><subject>Atomic structure</subject><subject>Biomaterials</subject><subject>Chemistry and Materials Science</subject><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>critical current</subject><subject>Critical current density</subject><subject>Crystal defects</subject><subject>Crystal structure</subject><subject>Crystallography</subject><subject>Energy Systems</subject><subject>Fe-based superconductors</subject><subject>Grain boundaries</subject><subject>Hc2</subject><subject>Ion irradiation</subject><subject>Jc</subject><subject>Low temperature</subject><subject>low-angle grain boundary</subject><subject>materials for energy and catalysis</subject><subject>MATERIALS SCIENCE</subject><subject>Microstructural analysis</subject><subject>Operating temperature</subject><subject>Optical and Electronic Materials</subject><subject>Pinning</subject><subject>Single crystals</subject><subject>Structural Materials</subject><subject>superconducting properties and materials</subject><subject>Superconductivity</subject><subject>Superconductors</subject><subject>Surface and Interface Science</subject><subject>Thin Films</subject><subject>upper critical field</subject><issn>1884-4049</issn><issn>1884-4057</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><sourceid>BENPR</sourceid><recordid>eNp9kUFPxCAQhRujiWb1D3gietHEKlBo4bhuXDVu4kXPhNLpbrULK9CY_fey1ujN07wM35sw87LslOBrggtxExhhtMoxJTnGRVHlfC87IkKwnGFe7f9qJg-zkxDeMMakLJng7CjbTjcb77RZdXaJ4grQ0MdurSOgMGzAG2ebwcTdY8JSI3YQkGvRxa2-erqcA50GiuotsjoOXvf9FrXOr6FBvfvMtV32gJZedxbVbrCN9omE-On8ezjODlrdBzj5qZPsdX73MnvIF8_3j7PpIjeMlzE3FS9rUWtZGN7IBsuGMQoVGCM4gC5pkrUgGFdlxSU3RrakpQ0kDTVIVkyys3GuC7FTwXQRzCrtZcFERQSVrJIJOh-htOXHACGqNzd4m_6lKBfpvmVJRKLoSBnvQvDQqo1Px_JbRbDaRaHGKFSKQn1HoXgyFaMpJNguwf-N_sf1BYnBjT0</recordid><startdate>20211022</startdate><enddate>20211022</enddate><creator>Iida, Kazumasa</creator><creator>Qin, Dongyi</creator><creator>Tarantini, Chiara</creator><creator>Hatano, Takafumi</creator><creator>Wang, Chao</creator><creator>Guo, Zimeng</creator><creator>Gao, Hongye</creator><creator>Saito, Hikaru</creator><creator>Hata, Satoshi</creator><creator>Naito, Michio</creator><creator>Yamamoto, Akiyasu</creator><general>Nature Publishing Group UK</general><general>Nature Publishing Group</general><general>Nature Publishing Group Asia</general><scope>C6C</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>OIOZB</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0003-1038-9630</orcidid><orcidid>https://orcid.org/0000-0002-3314-5906</orcidid><orcidid>https://orcid.org/0000-0003-1332-2589</orcidid><orcidid>https://orcid.org/0000000233145906</orcidid><orcidid>https://orcid.org/0000000310389630</orcidid><orcidid>https://orcid.org/0000000313322589</orcidid></search><sort><creationdate>20211022</creationdate><title>Approaching the ultimate superconducting properties of (Ba,K)Fe2As2 by naturally formed low-angle grain boundary networks</title><author>Iida, Kazumasa ; Qin, Dongyi ; Tarantini, Chiara ; Hatano, Takafumi ; Wang, Chao ; Guo, Zimeng ; Gao, Hongye ; Saito, Hikaru ; Hata, Satoshi ; Naito, Michio ; Yamamoto, Akiyasu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c456t-c756b8ba93c5d9d09d442e7ecc85eea627ecb8100767595cc9f1f2de595ebe943</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>639/301/119/1003</topic><topic>639/301/299</topic><topic>Atomic structure</topic><topic>Biomaterials</topic><topic>Chemistry and Materials Science</topic><topic>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</topic><topic>critical current</topic><topic>Critical current density</topic><topic>Crystal defects</topic><topic>Crystal structure</topic><topic>Crystallography</topic><topic>Energy Systems</topic><topic>Fe-based superconductors</topic><topic>Grain boundaries</topic><topic>Hc2</topic><topic>Ion irradiation</topic><topic>Jc</topic><topic>Low temperature</topic><topic>low-angle grain boundary</topic><topic>materials for energy and catalysis</topic><topic>MATERIALS SCIENCE</topic><topic>Microstructural analysis</topic><topic>Operating temperature</topic><topic>Optical and Electronic Materials</topic><topic>Pinning</topic><topic>Single crystals</topic><topic>Structural Materials</topic><topic>superconducting properties and materials</topic><topic>Superconductivity</topic><topic>Superconductors</topic><topic>Surface and Interface Science</topic><topic>Thin Films</topic><topic>upper critical field</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Iida, Kazumasa</creatorcontrib><creatorcontrib>Qin, Dongyi</creatorcontrib><creatorcontrib>Tarantini, Chiara</creatorcontrib><creatorcontrib>Hatano, Takafumi</creatorcontrib><creatorcontrib>Wang, Chao</creatorcontrib><creatorcontrib>Guo, Zimeng</creatorcontrib><creatorcontrib>Gao, Hongye</creatorcontrib><creatorcontrib>Saito, Hikaru</creatorcontrib><creatorcontrib>Hata, Satoshi</creatorcontrib><creatorcontrib>Naito, Michio</creatorcontrib><creatorcontrib>Yamamoto, Akiyasu</creatorcontrib><creatorcontrib>Florida State Univ., Tallahassee, FL (United States)</creatorcontrib><collection>Springer Nature OA Free Journals</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>NPG Asia Materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Iida, Kazumasa</au><au>Qin, Dongyi</au><au>Tarantini, Chiara</au><au>Hatano, Takafumi</au><au>Wang, Chao</au><au>Guo, Zimeng</au><au>Gao, Hongye</au><au>Saito, Hikaru</au><au>Hata, Satoshi</au><au>Naito, Michio</au><au>Yamamoto, Akiyasu</au><aucorp>Florida State Univ., Tallahassee, FL (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Approaching the ultimate superconducting properties of (Ba,K)Fe2As2 by naturally formed low-angle grain boundary networks</atitle><jtitle>NPG Asia Materials</jtitle><stitle>NPG Asia Mater</stitle><date>2021-10-22</date><risdate>2021</risdate><volume>13</volume><issue>1</issue><artnum>68</artnum><issn>1884-4049</issn><eissn>1884-4057</eissn><abstract>The most effective way to enhance the dissipation-free supercurrent in the presence of a magnetic field for type II superconductors is to introduce defects that act as artificial pinning centers (APCs) for vortices. For instance, the in-field critical current density of doped BaFe
2
As
2
(Ba122), one of the most technologically important Fe-based superconductors, has been improved over the last decade by APCs created by ion irradiation. The technique of ion irradiation has been commonly implemented to determine the ultimate superconducting properties. However, this method is rather complicated and expensive. Here, we report a surprisingly high critical current density and strong pinning efficiency close to the crystallographic
c
-axis for a K-doped Ba122 epitaxial thin film without APCs, achieving performance comparable to ion-irradiated K-doped Ba122 single crystals. Microstructural analysis reveals that the film is composed of columnar grains with widths of approximately 30–60 nm. The grains are rotated around the
b
- (or
a
-) axis by 1.5° and around the
c
-axis by −1°, resulting in the formation of low-angle grain boundary networks. This study demonstrates that the upper limit of in-field properties reached in ion-irradiated K-doped Ba122 is achievable by grain boundary engineering, which is a simple and industrially scalable manner.
Superconductivity: Engineering crytal structure
A way to optimize superconductivity by carefully controlling the atomic-level crystal structure has been developed by scientists in Japan and the USA. Superconductivity is a quantum effect, usually only seen at very low temperatures, in which an electrical current can pass through a material without facing any resistance. One approach to increasing the operating temperature is to intentionally introduce atomic-level defects using a technique called ion irradiation but this is technically complicated and expensive. Kazumasa Iida from Nagoya University, Japan, and co-workers have managed to achieve the levels of superconductivity associated with ion irradiation by using so-called grain boundary engineering. Regions of different crystalline orientation are known as grains. The team showed that by controlling the alignment of these grains during synthesis of the superconductor (Ba,K)Fe
2
As
2
, they could maximize the material’s superconductivity.
High critical current density and strong pinning efficiency for Fe-based superconductor, K-doped BaFe
2
As
2
, were achieved by naturally formed low-angle grain boundary networks. K-doped BaFe
2
As
2
thin film is composed of columnar grains with widths of approximately 30–60 nm. The grains are rotated around the
b
- (or
a
-) axis by 1.5° and around the
c
-axis by −1°, resulting in the formation of low-angle grain boundary networks. The achieving superconducting properties are almost 10 times as high as the K-doped BaFe
2
As
2
single crystal and comparable to ion-irradiated single crystal.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><doi>10.1038/s41427-021-00337-5</doi><orcidid>https://orcid.org/0000-0003-1038-9630</orcidid><orcidid>https://orcid.org/0000-0002-3314-5906</orcidid><orcidid>https://orcid.org/0000-0003-1332-2589</orcidid><orcidid>https://orcid.org/0000000233145906</orcidid><orcidid>https://orcid.org/0000000310389630</orcidid><orcidid>https://orcid.org/0000000313322589</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | NPG Asia Materials, 2021-10, Vol.13 (1), Article 68 |
| issn | 1884-4049 1884-4057 |
| language | eng |
| recordid | cdi_proquest_journals_2584146618 |
| source | Nature Free; DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; Free Full-Text Journals in Chemistry; Springer Nature OA Free Journals |
| subjects | 639/301/119/1003 639/301/299 Atomic structure Biomaterials Chemistry and Materials Science CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY critical current Critical current density Crystal defects Crystal structure Crystallography Energy Systems Fe-based superconductors Grain boundaries Hc2 Ion irradiation Jc Low temperature low-angle grain boundary materials for energy and catalysis MATERIALS SCIENCE Microstructural analysis Operating temperature Optical and Electronic Materials Pinning Single crystals Structural Materials superconducting properties and materials Superconductivity Superconductors Surface and Interface Science Thin Films upper critical field |
| title | Approaching the ultimate superconducting properties of (Ba,K)Fe2As2 by naturally formed low-angle grain boundary networks |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-12T10%3A58%3A01IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Approaching%20the%20ultimate%20superconducting%20properties%20of%20(Ba,K)Fe2As2%20by%20naturally%20formed%20low-angle%20grain%20boundary%20networks&rft.jtitle=NPG%20Asia%20Materials&rft.au=Iida,%20Kazumasa&rft.aucorp=Florida%20State%20Univ.,%20Tallahassee,%20FL%20(United%20States)&rft.date=2021-10-22&rft.volume=13&rft.issue=1&rft.artnum=68&rft.issn=1884-4049&rft.eissn=1884-4057&rft_id=info:doi/10.1038/s41427-021-00337-5&rft_dat=%3Cproquest_osti_%3E2584146618%3C/proquest_osti_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2584146618&rft_id=info:pmid/&rfr_iscdi=true |