TEM observation of nitrogen-tunable bcc–bct–fcc transformation of iron-cobalt with added vanadium
We used transmission electron microscopy (TEM) to observe tunable bcc–bct–fcc transformation of FeCo films caused by the addition of auxiliary elements. The crystal structure of the FeCo with added V was bcc, and the transformation of the bcc structure through the bct to fcc was found to depend on t...
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| Veröffentlicht in: | AIP advances 2020-01, Vol.10 (1), p.015110-015110-5 |
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| creator | Hasegawa, Takashi Shirai, Chihiro Takemasa, Yusuke Seki, Yuki |
| description | We used transmission electron microscopy (TEM) to observe tunable bcc–bct–fcc transformation of FeCo films caused by the addition of auxiliary elements. The crystal structure of the FeCo with added V was bcc, and the transformation of the bcc structure through the bct to fcc was found to depend on the N content (x). TEM observation revealed that bct structure with c/a = 1.12 was obtained for x = 1.7 atomic%, while fcc structure with c/a = 2 was obtained for x = 9.6 atomic%. The c/a-values depended on x, so the bcc–bct–fcc transformation of the FeCoV was tunable by N content. This research was made possible by special preventative measures taken during preparation to avoid compressive stress, which could otherwise induce the bct FeCo lattice of axial ratio c/a > 1.00 to transform to bcc structure. A FeCo coating of thickness 20 nm was therefore deposited directly on a MgO substrate without any other metallic layers. |
| doi_str_mv | 10.1063/1.5128398 |
| format | Article |
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The crystal structure of the FeCo with added V was bcc, and the transformation of the bcc structure through the bct to fcc was found to depend on the N content (x). TEM observation revealed that bct structure with c/a = 1.12 was obtained for x = 1.7 atomic%, while fcc structure with c/a = 2 was obtained for x = 9.6 atomic%. The c/a-values depended on x, so the bcc–bct–fcc transformation of the FeCoV was tunable by N content. This research was made possible by special preventative measures taken during preparation to avoid compressive stress, which could otherwise induce the bct FeCo lattice of axial ratio c/a > 1.00 to transform to bcc structure. 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A FeCo coating of thickness 20 nm was therefore deposited directly on a MgO substrate without any other metallic layers.</description><subject>Atomic structure</subject><subject>Axial stress</subject><subject>Compressive properties</subject><subject>Crystal structure</subject><subject>Nitrogen</subject><subject>Substrates</subject><subject>Transformations</subject><subject>Transmission electron microscopy</subject><issn>2158-3226</issn><issn>2158-3226</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>DOA</sourceid><recordid>eNqdkcFOHDEMhqOqSKDtHniDkThRaWgySSaZY4VoQdqKC5wjx0loVruTbZLdqjfeoW_IkzDsItozPtiW9fm3ZRNyyugFoz3_wi4k6zQf9Ady0jGpW951_cf_8mMyL2VJJxMDo1qcEH939aNJtvi8gxrT2KTQjLHm9ODHtm5HsCvfWMSnx78W6-QDYlMzjCWkvH5riTmNLSYLq9r8jvVnA8551-xgBBe360_kKMCq-PlrnJH7b1d3l9ft4vb7zeXXRYui07WVQmoGXDAEUHygzg1BB2TMDiF4ZX2wGIIegAohOZMI0veh7znXVCsQfEZuDrouwdJsclxD_mMSRLMvpPxgINeIK2-k816pANr3XABz1jPXoUS00CvF1aR1dtDa5PRr60s1y7TN47S-6TgXVNFumjwj5wcKcyol-_A2lVHz8hTDzOtTJvbzgS0Y6_5074N3Kf8DzcYF_gzqpZ1n</recordid><startdate>20200101</startdate><enddate>20200101</enddate><creator>Hasegawa, Takashi</creator><creator>Shirai, Chihiro</creator><creator>Takemasa, Yusuke</creator><creator>Seki, Yuki</creator><general>American Institute of Physics</general><general>AIP Publishing LLC</general><scope>AJDQP</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0002-8178-4980</orcidid></search><sort><creationdate>20200101</creationdate><title>TEM observation of nitrogen-tunable bcc–bct–fcc transformation of iron-cobalt with added vanadium</title><author>Hasegawa, Takashi ; Shirai, Chihiro ; Takemasa, Yusuke ; Seki, Yuki</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c428t-54581a341caa7390dd9f8fc11b9ffe7befbcff89a0445315ca5e6f66338087a43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Atomic structure</topic><topic>Axial stress</topic><topic>Compressive properties</topic><topic>Crystal structure</topic><topic>Nitrogen</topic><topic>Substrates</topic><topic>Transformations</topic><topic>Transmission electron microscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hasegawa, Takashi</creatorcontrib><creatorcontrib>Shirai, Chihiro</creatorcontrib><creatorcontrib>Takemasa, Yusuke</creatorcontrib><creatorcontrib>Seki, Yuki</creatorcontrib><collection>AIP Open Access Journals</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>AIP advances</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hasegawa, Takashi</au><au>Shirai, Chihiro</au><au>Takemasa, Yusuke</au><au>Seki, Yuki</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>TEM observation of nitrogen-tunable bcc–bct–fcc transformation of iron-cobalt with added vanadium</atitle><jtitle>AIP advances</jtitle><date>2020-01-01</date><risdate>2020</risdate><volume>10</volume><issue>1</issue><spage>015110</spage><epage>015110-5</epage><pages>015110-015110-5</pages><issn>2158-3226</issn><eissn>2158-3226</eissn><coden>AAIDBI</coden><abstract>We used transmission electron microscopy (TEM) to observe tunable bcc–bct–fcc transformation of FeCo films caused by the addition of auxiliary elements. The crystal structure of the FeCo with added V was bcc, and the transformation of the bcc structure through the bct to fcc was found to depend on the N content (x). TEM observation revealed that bct structure with c/a = 1.12 was obtained for x = 1.7 atomic%, while fcc structure with c/a = 2 was obtained for x = 9.6 atomic%. The c/a-values depended on x, so the bcc–bct–fcc transformation of the FeCoV was tunable by N content. This research was made possible by special preventative measures taken during preparation to avoid compressive stress, which could otherwise induce the bct FeCo lattice of axial ratio c/a > 1.00 to transform to bcc structure. A FeCo coating of thickness 20 nm was therefore deposited directly on a MgO substrate without any other metallic layers.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.5128398</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0002-8178-4980</orcidid><oa>free_for_read</oa></addata></record> |
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| source | DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | Atomic structure Axial stress Compressive properties Crystal structure Nitrogen Substrates Transformations Transmission electron microscopy |
| title | TEM observation of nitrogen-tunable bcc–bct–fcc transformation of iron-cobalt with added vanadium |
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