Enhanced exchange bias and coercivity arising from heterojunctions in Ni-NiO nanocomposites
By a reflux process, we prepared Ni-NiO nanocomposites that are face-centered cubic (fcc). By tuning the precursor concentration, we controlled the Ni content in the Ni-NiO nanocomposites. We found that both the interface of Ni and NiO crystal lattices and the weight fraction of Ni have significant...
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| Veröffentlicht in: | Physical chemistry chemical physics : PCCP 2014-04, Vol.16 (15), p.6925-693 |
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| container_title | Physical chemistry chemical physics : PCCP |
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| creator | Yao, Xiu-Juan He, Xue-Min Song, Xue-Yin Ding, Qian Li, Zhi-Wen Zhong, Wei Au, Chak-Tong Du, You-Wei |
| description | By a reflux process, we prepared Ni-NiO nanocomposites that are face-centered cubic (fcc). By tuning the precursor concentration, we controlled the Ni content in the Ni-NiO nanocomposites. We found that both the interface of Ni and NiO crystal lattices and the weight fraction of Ni have significant impacts on their magnetic properties. There is increase of saturation magnetization and decrease of coercivity (
H
C
) with the increase of the Ni weight fraction. Large exchange bias (
H
E
) and enhanced
H
C
are observed at 5 K, which are due to the creation of heterojunctions at the interfaces of ferromagnetic Ni and antiferromagnetic NiO. After optimization, it is observed that the Ni-NiO nanocomposites with an Ni content of 2.6% show an
H
C
and
H
E
of 1068 and 350 Oe, respectively.
The hysteresis loop of Ni-NiO nanocomposites at 5 K reveals a relatively large exchange bias and enhanced coercivity. |
| doi_str_mv | 10.1039/c3cp55316g |
| format | Article |
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H
C
) with the increase of the Ni weight fraction. Large exchange bias (
H
E
) and enhanced
H
C
are observed at 5 K, which are due to the creation of heterojunctions at the interfaces of ferromagnetic Ni and antiferromagnetic NiO. After optimization, it is observed that the Ni-NiO nanocomposites with an Ni content of 2.6% show an
H
C
and
H
E
of 1068 and 350 Oe, respectively.
The hysteresis loop of Ni-NiO nanocomposites at 5 K reveals a relatively large exchange bias and enhanced coercivity.</description><identifier>ISSN: 1463-9076</identifier><identifier>EISSN: 1463-9084</identifier><identifier>DOI: 10.1039/c3cp55316g</identifier><identifier>PMID: 24595861</identifier><language>eng</language><publisher>England</publisher><subject>Bias ; Coercive force ; Coercivity ; Heterojunctions ; Nanocomposites ; Nickel ; Saturation (magnetic) ; Tuning</subject><ispartof>Physical chemistry chemical physics : PCCP, 2014-04, Vol.16 (15), p.6925-693</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c405t-d310e2ff6958dcc9ba93fdb29741e7dc7ff882fd6bae340b4dfa01553acda8bc3</citedby><cites>FETCH-LOGICAL-c405t-d310e2ff6958dcc9ba93fdb29741e7dc7ff882fd6bae340b4dfa01553acda8bc3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27923,27924</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24595861$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Yao, Xiu-Juan</creatorcontrib><creatorcontrib>He, Xue-Min</creatorcontrib><creatorcontrib>Song, Xue-Yin</creatorcontrib><creatorcontrib>Ding, Qian</creatorcontrib><creatorcontrib>Li, Zhi-Wen</creatorcontrib><creatorcontrib>Zhong, Wei</creatorcontrib><creatorcontrib>Au, Chak-Tong</creatorcontrib><creatorcontrib>Du, You-Wei</creatorcontrib><title>Enhanced exchange bias and coercivity arising from heterojunctions in Ni-NiO nanocomposites</title><title>Physical chemistry chemical physics : PCCP</title><addtitle>Phys Chem Chem Phys</addtitle><description>By a reflux process, we prepared Ni-NiO nanocomposites that are face-centered cubic (fcc). By tuning the precursor concentration, we controlled the Ni content in the Ni-NiO nanocomposites. We found that both the interface of Ni and NiO crystal lattices and the weight fraction of Ni have significant impacts on their magnetic properties. There is increase of saturation magnetization and decrease of coercivity (
H
C
) with the increase of the Ni weight fraction. Large exchange bias (
H
E
) and enhanced
H
C
are observed at 5 K, which are due to the creation of heterojunctions at the interfaces of ferromagnetic Ni and antiferromagnetic NiO. After optimization, it is observed that the Ni-NiO nanocomposites with an Ni content of 2.6% show an
H
C
and
H
E
of 1068 and 350 Oe, respectively.
The hysteresis loop of Ni-NiO nanocomposites at 5 K reveals a relatively large exchange bias and enhanced coercivity.</description><subject>Bias</subject><subject>Coercive force</subject><subject>Coercivity</subject><subject>Heterojunctions</subject><subject>Nanocomposites</subject><subject>Nickel</subject><subject>Saturation (magnetic)</subject><subject>Tuning</subject><issn>1463-9076</issn><issn>1463-9084</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqNkM1LAzEUxIMotlYv3pV4E2E12exXjlLqB0h70ZOHJfuStCndZE12xf73rrRWvIinNzA_hnmD0Ckl15QwfgMMmjRlNJvvoSFNMhZxUiT7O51nA3QUwpIQQlPKDtEgTlKeFhkdoteJXQgLSmL1Ab2aK1wZEbCwEoNTHsy7addYeBOMnWPtXY0XqlXeLTsLrXE2YGPx1ERTM8NWWAeublwwrQrH6ECLVVAn2ztCL3eT5_FD9DS7fxzfPkWQkLSNJKNExVpnfSUJwCvBmZZVzPOEqlxCrnVRxFpmlVAsIVUitegfSZkAKYoK2AhdbnIb7946FdqyNgHUaiWscl0oaRoTntO84P9ACU9onMdxj15tUPAuBK902XhTC78uKSm_di9_du_h821uV9VK7tDvoXvgbAP4ADv3V8DFX37ZSM0-ASrclQs</recordid><startdate>20140421</startdate><enddate>20140421</enddate><creator>Yao, Xiu-Juan</creator><creator>He, Xue-Min</creator><creator>Song, Xue-Yin</creator><creator>Ding, Qian</creator><creator>Li, Zhi-Wen</creator><creator>Zhong, Wei</creator><creator>Au, Chak-Tong</creator><creator>Du, You-Wei</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20140421</creationdate><title>Enhanced exchange bias and coercivity arising from heterojunctions in Ni-NiO nanocomposites</title><author>Yao, Xiu-Juan ; He, Xue-Min ; Song, Xue-Yin ; Ding, Qian ; Li, Zhi-Wen ; Zhong, Wei ; Au, Chak-Tong ; Du, You-Wei</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c405t-d310e2ff6958dcc9ba93fdb29741e7dc7ff882fd6bae340b4dfa01553acda8bc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Bias</topic><topic>Coercive force</topic><topic>Coercivity</topic><topic>Heterojunctions</topic><topic>Nanocomposites</topic><topic>Nickel</topic><topic>Saturation (magnetic)</topic><topic>Tuning</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yao, Xiu-Juan</creatorcontrib><creatorcontrib>He, Xue-Min</creatorcontrib><creatorcontrib>Song, Xue-Yin</creatorcontrib><creatorcontrib>Ding, Qian</creatorcontrib><creatorcontrib>Li, Zhi-Wen</creatorcontrib><creatorcontrib>Zhong, Wei</creatorcontrib><creatorcontrib>Au, Chak-Tong</creatorcontrib><creatorcontrib>Du, You-Wei</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physical chemistry chemical physics : PCCP</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yao, Xiu-Juan</au><au>He, Xue-Min</au><au>Song, Xue-Yin</au><au>Ding, Qian</au><au>Li, Zhi-Wen</au><au>Zhong, Wei</au><au>Au, Chak-Tong</au><au>Du, You-Wei</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Enhanced exchange bias and coercivity arising from heterojunctions in Ni-NiO nanocomposites</atitle><jtitle>Physical chemistry chemical physics : PCCP</jtitle><addtitle>Phys Chem Chem Phys</addtitle><date>2014-04-21</date><risdate>2014</risdate><volume>16</volume><issue>15</issue><spage>6925</spage><epage>693</epage><pages>6925-693</pages><issn>1463-9076</issn><eissn>1463-9084</eissn><abstract>By a reflux process, we prepared Ni-NiO nanocomposites that are face-centered cubic (fcc). By tuning the precursor concentration, we controlled the Ni content in the Ni-NiO nanocomposites. We found that both the interface of Ni and NiO crystal lattices and the weight fraction of Ni have significant impacts on their magnetic properties. There is increase of saturation magnetization and decrease of coercivity (
H
C
) with the increase of the Ni weight fraction. Large exchange bias (
H
E
) and enhanced
H
C
are observed at 5 K, which are due to the creation of heterojunctions at the interfaces of ferromagnetic Ni and antiferromagnetic NiO. After optimization, it is observed that the Ni-NiO nanocomposites with an Ni content of 2.6% show an
H
C
and
H
E
of 1068 and 350 Oe, respectively.
The hysteresis loop of Ni-NiO nanocomposites at 5 K reveals a relatively large exchange bias and enhanced coercivity.</abstract><cop>England</cop><pmid>24595861</pmid><doi>10.1039/c3cp55316g</doi><tpages>6</tpages></addata></record> |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Bias Coercive force Coercivity Heterojunctions Nanocomposites Nickel Saturation (magnetic) Tuning |
| title | Enhanced exchange bias and coercivity arising from heterojunctions in Ni-NiO nanocomposites |
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