Interface mixing and its impact on exchange coupling in exchange biased systems
Exchange bias and interlayer exchange coupling are interface driven phenomena. Since an ideal interface is very challenging to achieve, a clear understanding of the chemical and magnetic natures of interfaces is pivotal to identify their influence on the magnetism. We have chosen Ni80Fe20/CoO(tCoO)/...
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| Veröffentlicht in: | Journal of physics. Condensed matter 2016-12, Vol.28 (48), p.486004-486004 |
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| container_issue | 48 |
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| container_title | Journal of physics. Condensed matter |
| container_volume | 28 |
| creator | Manna, P K Skoropata, E Ting, Y-W Lin, K-W Freeland, J W van Lierop, J |
| description | Exchange bias and interlayer exchange coupling are interface driven phenomena. Since an ideal interface is very challenging to achieve, a clear understanding of the chemical and magnetic natures of interfaces is pivotal to identify their influence on the magnetism. We have chosen Ni80Fe20/CoO(tCoO)/Co trilayers as a model system, and identified non-stoichiometric Ni-ferrite and Co-ferrite at the surface and interface, respectively. These ferrites, being ferrimagnets typically, should influence the exchange coupling. However, in our trilayers the interface ferrites were found not to be ferro- or ferri-magnetic; thus having no observable influence on the exchange coupling. Our analysis also revealed that (i) interlayer exchange coupling was present between Ni80Fe20 and Co even though the interlayer thickness was significantly larger than expected for this phenomenon to happen, and (ii) the majority of the CoO layer (except some portion near the interface) did not contribute to the observed exchange bias. We also identified that the interlayer exchange coupling and the exchange bias properties were not interdependent. |
| doi_str_mv | 10.1088/0953-8984/28/48/486004 |
| format | Article |
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Our analysis also revealed that (i) interlayer exchange coupling was present between Ni80Fe20 and Co even though the interlayer thickness was significantly larger than expected for this phenomenon to happen, and (ii) the majority of the CoO layer (except some portion near the interface) did not contribute to the observed exchange bias. We also identified that the interlayer exchange coupling and the exchange bias properties were not interdependent.</description><identifier>ISSN: 0953-8984</identifier><identifier>EISSN: 1361-648X</identifier><identifier>DOI: 10.1088/0953-8984/28/48/486004</identifier><identifier>PMID: 27705957</identifier><identifier>CODEN: JCOMEL</identifier><language>eng</language><publisher>England: IOP Publishing</publisher><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ; Exchange bias ; interface mixing ; Interlayer exchange coupling ; x-ray absorption spectroscopy (XAS) ; x-ray magnetic circular dichroism (XMCD) ; x-ray magnetic circular dichrosim (XMCD)</subject><ispartof>Journal of physics. 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(ANL), Argonne, IL (United States)</creatorcontrib><title>Interface mixing and its impact on exchange coupling in exchange biased systems</title><title>Journal of physics. Condensed matter</title><addtitle>JPhysCM</addtitle><addtitle>J. Phys.: Condens. Matter</addtitle><description>Exchange bias and interlayer exchange coupling are interface driven phenomena. Since an ideal interface is very challenging to achieve, a clear understanding of the chemical and magnetic natures of interfaces is pivotal to identify their influence on the magnetism. We have chosen Ni80Fe20/CoO(tCoO)/Co trilayers as a model system, and identified non-stoichiometric Ni-ferrite and Co-ferrite at the surface and interface, respectively. These ferrites, being ferrimagnets typically, should influence the exchange coupling. However, in our trilayers the interface ferrites were found not to be ferro- or ferri-magnetic; thus having no observable influence on the exchange coupling. Our analysis also revealed that (i) interlayer exchange coupling was present between Ni80Fe20 and Co even though the interlayer thickness was significantly larger than expected for this phenomenon to happen, and (ii) the majority of the CoO layer (except some portion near the interface) did not contribute to the observed exchange bias. We also identified that the interlayer exchange coupling and the exchange bias properties were not interdependent.</description><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>Exchange bias</subject><subject>interface mixing</subject><subject>Interlayer exchange coupling</subject><subject>x-ray absorption spectroscopy (XAS)</subject><subject>x-ray magnetic circular dichroism (XMCD)</subject><subject>x-ray magnetic circular dichrosim (XMCD)</subject><issn>0953-8984</issn><issn>1361-648X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LxDAQhoMouq7-BSle9FI3adI0Pcrix4KwFwVvIU2ma2Sb1CYF_fe2VBcFQRgYGJ53hnkQOiP4imAhFrjMaSpKwRaZWLCxOMZsD80I5STlTDzvo9kOOkLHIbzigRCUHaKjrChwXubFDK1XLkJXKw1JY9-t2yTKmcTGkNimVTom3iXwrl-U20Cifd9uR8b-GFZWBTBJ-AgRmnCCDmq1DXD61efo6fbmcXmfPqzvVsvrh1QzTmIqaqpxyUERTWtSKCqoyUtTMsZ4oWD4UJucmaLiXHEGFatrTDJeMQqVKRilc3Q-7fUhWhm0jaBftHcOdJSEFoLgcoAuJ6jt_FsPIcrGBg3brXLg-yCJoDnlHHM2oHxCdedD6KCWbWcb1X1IguVoXI4y5ShTZkKysUbjQ_Ds60ZfNWB2sW_FA5BNgPWtfPV95wYv_2-9-COkm1-UbE1NPwHs-Jd0</recordid><startdate>20161207</startdate><enddate>20161207</enddate><creator>Manna, P K</creator><creator>Skoropata, E</creator><creator>Ting, Y-W</creator><creator>Lin, K-W</creator><creator>Freeland, J W</creator><creator>van Lierop, J</creator><general>IOP Publishing</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>OIOZB</scope><scope>OTOTI</scope></search><sort><creationdate>20161207</creationdate><title>Interface mixing and its impact on exchange coupling in exchange biased systems</title><author>Manna, P K ; Skoropata, E ; Ting, Y-W ; Lin, K-W ; Freeland, J W ; van Lierop, J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c461t-8f3c096ea1c3f17a383d59d944467ae088cd54d7b66a64eb4ff0126b43ebd7433</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</topic><topic>Exchange bias</topic><topic>interface mixing</topic><topic>Interlayer exchange coupling</topic><topic>x-ray absorption spectroscopy (XAS)</topic><topic>x-ray magnetic circular dichroism (XMCD)</topic><topic>x-ray magnetic circular dichrosim (XMCD)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Manna, P K</creatorcontrib><creatorcontrib>Skoropata, E</creatorcontrib><creatorcontrib>Ting, Y-W</creatorcontrib><creatorcontrib>Lin, K-W</creatorcontrib><creatorcontrib>Freeland, J W</creatorcontrib><creatorcontrib>van Lierop, J</creatorcontrib><creatorcontrib>Argonne National Lab. (ANL), Argonne, IL (United States)</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>Journal of physics. Condensed matter</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Manna, P K</au><au>Skoropata, E</au><au>Ting, Y-W</au><au>Lin, K-W</au><au>Freeland, J W</au><au>van Lierop, J</au><aucorp>Argonne National Lab. (ANL), Argonne, IL (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Interface mixing and its impact on exchange coupling in exchange biased systems</atitle><jtitle>Journal of physics. Condensed matter</jtitle><stitle>JPhysCM</stitle><addtitle>J. Phys.: Condens. Matter</addtitle><date>2016-12-07</date><risdate>2016</risdate><volume>28</volume><issue>48</issue><spage>486004</spage><epage>486004</epage><pages>486004-486004</pages><issn>0953-8984</issn><eissn>1361-648X</eissn><coden>JCOMEL</coden><abstract>Exchange bias and interlayer exchange coupling are interface driven phenomena. Since an ideal interface is very challenging to achieve, a clear understanding of the chemical and magnetic natures of interfaces is pivotal to identify their influence on the magnetism. We have chosen Ni80Fe20/CoO(tCoO)/Co trilayers as a model system, and identified non-stoichiometric Ni-ferrite and Co-ferrite at the surface and interface, respectively. These ferrites, being ferrimagnets typically, should influence the exchange coupling. However, in our trilayers the interface ferrites were found not to be ferro- or ferri-magnetic; thus having no observable influence on the exchange coupling. 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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Exchange bias interface mixing Interlayer exchange coupling x-ray absorption spectroscopy (XAS) x-ray magnetic circular dichroism (XMCD) x-ray magnetic circular dichrosim (XMCD) |
| title | Interface mixing and its impact on exchange coupling in exchange biased systems |
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