Fourfold magnetic anisotropy induced in CoFeB/IrMn bilayers by interfacial exchange coupling
Exchange bias (EB) occurring in ferromagnetic (FM)/antiferromagnetic (AFM) bilayers conventionally can lead to a unidirectional magnetic anisotropy ( K eb ) as well as an accompanied uniaxial magnetic anisotropy ( K u ). We observed an additional fourfold magnetic anisotropy ( K 4 ) induced by inter...
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| Veröffentlicht in: | New journal of physics 2023-02, Vol.25 (2), p.23005 |
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| creator | Feng, Xinwei Meng, Jing Zhu, Xiaoyan Xue, Kelei Xie, Yali Jiang, Dongmei Xu, Yang Shang, Tian Hu, Yong Zhan, Qingfeng |
| description | Exchange bias (EB) occurring in ferromagnetic (FM)/antiferromagnetic (AFM) bilayers conventionally can lead to a unidirectional magnetic anisotropy (
K
eb
) as well as an accompanied uniaxial magnetic anisotropy (
K
u
). We observed an additional fourfold magnetic anisotropy (
K
4
) induced by interfacial exchange coupling in amorphous CoFeB/epitaxial IrMn bilayers with an EB. Because of the combined effect of the three kinds of magnetic anisotropies, one- and two-step magnetic switching processes were observed at different magnetic field orientations, which usually appear in single-crystal FM layer with an intrinsic magnetocrystalline anisotropy but not in amorphous FM layer. The angular dependent magnetic switching fields can be nicely fitted by a phenomenological model based on domain wall nucleation and propagation with the in-plane
K
4
along . The ferromagnetic resonance measurements indicate that the specific strength of
K
4
for EB along [100] is larger than that for EB along [110]. The induced
K
4
can be understood by considering two types of AFM domains caused by both monatomic steps and defects and their induced net uncompensated spins along the in-plane axes. The different dependence of
K
4
on the EB direction are because of the different effects of growth magnetic field on the presence of AFM domains. |
| doi_str_mv | 10.1088/1367-2630/acb6e7 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_doaj_</sourceid><recordid>TN_cdi_proquest_journals_2774250242</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><doaj_id>oai_doaj_org_article_ea6ef52728f44a039ba4281147d42501</doaj_id><sourcerecordid>2774250242</sourcerecordid><originalsourceid>FETCH-LOGICAL-c448t-fe30d896aba0d663d530d1f7201946b84b2ac4c88fd261cd18ed67edbc83185c3</originalsourceid><addsrcrecordid>eNp9kT1PwzAQhiMEEqWwM0ZiYKHUX3HcESoKlUAssCFZF_tcXKVxcFKJ_nsSgoABMd2HnnvPfi9JTim5pESpKeUynzDJyRRMITHfS0bfrf1f-WFy1DRrQihVjI2Sl0XYRhdKm25gVWHrTQqVb0IbQ71LfWW3Bm0X03lY4PV0GR-qtPAl7DA2adETLUYHxkOZ4rt5hWqFqQnbuvTV6jg5cFA2ePIVx8nz4uZpfje5f7xdzq_uJ0YI1U4ccmLVTEIBxErJbdbV1OWM0JmQhRIFAyOMUs4ySY2lCq3M0RZGcaoyw8fJctC1Ada6jn4DcacDeP3ZCHGlIXZfK1EjSHQZy5lyQgDhswIEU5SK3AqWEdppnQ1adQxvW2xave4cqrrna5bnPcME6ygyUCaGponovrdSovt76N5w3Ruuh3t0IxfDiA_1j-Y_-PkfeLWuNcs004RxQjJdW8c_AN9KmRU</addsrcrecordid><sourcetype>Open Website</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2774250242</pqid></control><display><type>article</type><title>Fourfold magnetic anisotropy induced in CoFeB/IrMn bilayers by interfacial exchange coupling</title><source>DOAJ Directory of Open Access Journals</source><source>Institute of Physics Open Access Journal Titles</source><source>EZB-FREE-00999 freely available EZB journals</source><source>IOPscience extra</source><source>Alma/SFX Local Collection</source><source>Free Full-Text Journals in Chemistry</source><creator>Feng, Xinwei ; Meng, Jing ; Zhu, Xiaoyan ; Xue, Kelei ; Xie, Yali ; Jiang, Dongmei ; Xu, Yang ; Shang, Tian ; Hu, Yong ; Zhan, Qingfeng</creator><creatorcontrib>Feng, Xinwei ; Meng, Jing ; Zhu, Xiaoyan ; Xue, Kelei ; Xie, Yali ; Jiang, Dongmei ; Xu, Yang ; Shang, Tian ; Hu, Yong ; Zhan, Qingfeng</creatorcontrib><description>Exchange bias (EB) occurring in ferromagnetic (FM)/antiferromagnetic (AFM) bilayers conventionally can lead to a unidirectional magnetic anisotropy (
K
eb
) as well as an accompanied uniaxial magnetic anisotropy (
K
u
). We observed an additional fourfold magnetic anisotropy (
K
4
) induced by interfacial exchange coupling in amorphous CoFeB/epitaxial IrMn bilayers with an EB. Because of the combined effect of the three kinds of magnetic anisotropies, one- and two-step magnetic switching processes were observed at different magnetic field orientations, which usually appear in single-crystal FM layer with an intrinsic magnetocrystalline anisotropy but not in amorphous FM layer. The angular dependent magnetic switching fields can be nicely fitted by a phenomenological model based on domain wall nucleation and propagation with the in-plane
K
4
along . The ferromagnetic resonance measurements indicate that the specific strength of
K
4
for EB along [100] is larger than that for EB along [110]. The induced
K
4
can be understood by considering two types of AFM domains caused by both monatomic steps and defects and their induced net uncompensated spins along the in-plane axes. The different dependence of
K
4
on the EB direction are because of the different effects of growth magnetic field on the presence of AFM domains.</description><identifier>ISSN: 1367-2630</identifier><identifier>EISSN: 1367-2630</identifier><identifier>DOI: 10.1088/1367-2630/acb6e7</identifier><identifier>CODEN: NJOPFM</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Anisotropy ; Antiferromagnetism ; CoFeB/IrMn bilayer ; Coupling ; Crystal defects ; Domain walls ; Exchanging ; Ferromagnetic resonance ; Ferromagnetism ; four-fold magnetic anisotropy ; interfacial exchange coupling ; Magnetic anisotropy ; Magnetic domains ; Magnetic fields ; Magnetic switching ; Magnetism ; Nucleation ; Physics ; Single crystals</subject><ispartof>New journal of physics, 2023-02, Vol.25 (2), p.23005</ispartof><rights>2023 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft</rights><rights>2023 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. 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-c448t-fe30d896aba0d663d530d1f7201946b84b2ac4c88fd261cd18ed67edbc83185c3</citedby><cites>FETCH-LOGICAL-c448t-fe30d896aba0d663d530d1f7201946b84b2ac4c88fd261cd18ed67edbc83185c3</cites><orcidid>0000-0002-5916-0020 ; 0000-0001-5595-7625 ; 0000-0001-7479-3128 ; 0000-0003-4614-9735</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1367-2630/acb6e7/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>314,780,784,864,2102,27924,27925,38868,38890,53840,53867</link.rule.ids></links><search><creatorcontrib>Feng, Xinwei</creatorcontrib><creatorcontrib>Meng, Jing</creatorcontrib><creatorcontrib>Zhu, Xiaoyan</creatorcontrib><creatorcontrib>Xue, Kelei</creatorcontrib><creatorcontrib>Xie, Yali</creatorcontrib><creatorcontrib>Jiang, Dongmei</creatorcontrib><creatorcontrib>Xu, Yang</creatorcontrib><creatorcontrib>Shang, Tian</creatorcontrib><creatorcontrib>Hu, Yong</creatorcontrib><creatorcontrib>Zhan, Qingfeng</creatorcontrib><title>Fourfold magnetic anisotropy induced in CoFeB/IrMn bilayers by interfacial exchange coupling</title><title>New journal of physics</title><addtitle>NJP</addtitle><addtitle>New J. Phys</addtitle><description>Exchange bias (EB) occurring in ferromagnetic (FM)/antiferromagnetic (AFM) bilayers conventionally can lead to a unidirectional magnetic anisotropy (
K
eb
) as well as an accompanied uniaxial magnetic anisotropy (
K
u
). We observed an additional fourfold magnetic anisotropy (
K
4
) induced by interfacial exchange coupling in amorphous CoFeB/epitaxial IrMn bilayers with an EB. Because of the combined effect of the three kinds of magnetic anisotropies, one- and two-step magnetic switching processes were observed at different magnetic field orientations, which usually appear in single-crystal FM layer with an intrinsic magnetocrystalline anisotropy but not in amorphous FM layer. The angular dependent magnetic switching fields can be nicely fitted by a phenomenological model based on domain wall nucleation and propagation with the in-plane
K
4
along . The ferromagnetic resonance measurements indicate that the specific strength of
K
4
for EB along [100] is larger than that for EB along [110]. The induced
K
4
can be understood by considering two types of AFM domains caused by both monatomic steps and defects and their induced net uncompensated spins along the in-plane axes. The different dependence of
K
4
on the EB direction are because of the different effects of growth magnetic field on the presence of AFM domains.</description><subject>Anisotropy</subject><subject>Antiferromagnetism</subject><subject>CoFeB/IrMn bilayer</subject><subject>Coupling</subject><subject>Crystal defects</subject><subject>Domain walls</subject><subject>Exchanging</subject><subject>Ferromagnetic resonance</subject><subject>Ferromagnetism</subject><subject>four-fold magnetic anisotropy</subject><subject>interfacial exchange coupling</subject><subject>Magnetic anisotropy</subject><subject>Magnetic domains</subject><subject>Magnetic fields</subject><subject>Magnetic switching</subject><subject>Magnetism</subject><subject>Nucleation</subject><subject>Physics</subject><subject>Single crystals</subject><issn>1367-2630</issn><issn>1367-2630</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>DOA</sourceid><recordid>eNp9kT1PwzAQhiMEEqWwM0ZiYKHUX3HcESoKlUAssCFZF_tcXKVxcFKJ_nsSgoABMd2HnnvPfi9JTim5pESpKeUynzDJyRRMITHfS0bfrf1f-WFy1DRrQihVjI2Sl0XYRhdKm25gVWHrTQqVb0IbQ71LfWW3Bm0X03lY4PV0GR-qtPAl7DA2adETLUYHxkOZ4rt5hWqFqQnbuvTV6jg5cFA2ePIVx8nz4uZpfje5f7xdzq_uJ0YI1U4ccmLVTEIBxErJbdbV1OWM0JmQhRIFAyOMUs4ySY2lCq3M0RZGcaoyw8fJctC1Ada6jn4DcacDeP3ZCHGlIXZfK1EjSHQZy5lyQgDhswIEU5SK3AqWEdppnQ1adQxvW2xave4cqrrna5bnPcME6ygyUCaGponovrdSovt76N5w3Ruuh3t0IxfDiA_1j-Y_-PkfeLWuNcs004RxQjJdW8c_AN9KmRU</recordid><startdate>20230201</startdate><enddate>20230201</enddate><creator>Feng, Xinwei</creator><creator>Meng, Jing</creator><creator>Zhu, Xiaoyan</creator><creator>Xue, Kelei</creator><creator>Xie, Yali</creator><creator>Jiang, Dongmei</creator><creator>Xu, Yang</creator><creator>Shang, Tian</creator><creator>Hu, Yong</creator><creator>Zhan, Qingfeng</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>H8D</scope><scope>L7M</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0002-5916-0020</orcidid><orcidid>https://orcid.org/0000-0001-5595-7625</orcidid><orcidid>https://orcid.org/0000-0001-7479-3128</orcidid><orcidid>https://orcid.org/0000-0003-4614-9735</orcidid></search><sort><creationdate>20230201</creationdate><title>Fourfold magnetic anisotropy induced in CoFeB/IrMn bilayers by interfacial exchange coupling</title><author>Feng, Xinwei ; Meng, Jing ; Zhu, Xiaoyan ; Xue, Kelei ; Xie, Yali ; Jiang, Dongmei ; Xu, Yang ; Shang, Tian ; Hu, Yong ; Zhan, Qingfeng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c448t-fe30d896aba0d663d530d1f7201946b84b2ac4c88fd261cd18ed67edbc83185c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Anisotropy</topic><topic>Antiferromagnetism</topic><topic>CoFeB/IrMn bilayer</topic><topic>Coupling</topic><topic>Crystal defects</topic><topic>Domain walls</topic><topic>Exchanging</topic><topic>Ferromagnetic resonance</topic><topic>Ferromagnetism</topic><topic>four-fold magnetic anisotropy</topic><topic>interfacial exchange coupling</topic><topic>Magnetic anisotropy</topic><topic>Magnetic domains</topic><topic>Magnetic fields</topic><topic>Magnetic switching</topic><topic>Magnetism</topic><topic>Nucleation</topic><topic>Physics</topic><topic>Single crystals</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Feng, Xinwei</creatorcontrib><creatorcontrib>Meng, Jing</creatorcontrib><creatorcontrib>Zhu, Xiaoyan</creatorcontrib><creatorcontrib>Xue, Kelei</creatorcontrib><creatorcontrib>Xie, Yali</creatorcontrib><creatorcontrib>Jiang, Dongmei</creatorcontrib><creatorcontrib>Xu, Yang</creatorcontrib><creatorcontrib>Shang, Tian</creatorcontrib><creatorcontrib>Hu, Yong</creatorcontrib><creatorcontrib>Zhan, Qingfeng</creatorcontrib><collection>Institute of Physics Open Access Journal Titles</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>Proquest Central</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</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>DOAJ Directory of Open Access Journals</collection><jtitle>New journal of physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Feng, Xinwei</au><au>Meng, Jing</au><au>Zhu, Xiaoyan</au><au>Xue, Kelei</au><au>Xie, Yali</au><au>Jiang, Dongmei</au><au>Xu, Yang</au><au>Shang, Tian</au><au>Hu, Yong</au><au>Zhan, Qingfeng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fourfold magnetic anisotropy induced in CoFeB/IrMn bilayers by interfacial exchange coupling</atitle><jtitle>New journal of physics</jtitle><stitle>NJP</stitle><addtitle>New J. Phys</addtitle><date>2023-02-01</date><risdate>2023</risdate><volume>25</volume><issue>2</issue><spage>23005</spage><pages>23005-</pages><issn>1367-2630</issn><eissn>1367-2630</eissn><coden>NJOPFM</coden><abstract>Exchange bias (EB) occurring in ferromagnetic (FM)/antiferromagnetic (AFM) bilayers conventionally can lead to a unidirectional magnetic anisotropy (
K
eb
) as well as an accompanied uniaxial magnetic anisotropy (
K
u
). We observed an additional fourfold magnetic anisotropy (
K
4
) induced by interfacial exchange coupling in amorphous CoFeB/epitaxial IrMn bilayers with an EB. Because of the combined effect of the three kinds of magnetic anisotropies, one- and two-step magnetic switching processes were observed at different magnetic field orientations, which usually appear in single-crystal FM layer with an intrinsic magnetocrystalline anisotropy but not in amorphous FM layer. The angular dependent magnetic switching fields can be nicely fitted by a phenomenological model based on domain wall nucleation and propagation with the in-plane
K
4
along . The ferromagnetic resonance measurements indicate that the specific strength of
K
4
for EB along [100] is larger than that for EB along [110]. The induced
K
4
can be understood by considering two types of AFM domains caused by both monatomic steps and defects and their induced net uncompensated spins along the in-plane axes. The different dependence of
K
4
on the EB direction are because of the different effects of growth magnetic field on the presence of AFM domains.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/1367-2630/acb6e7</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-5916-0020</orcidid><orcidid>https://orcid.org/0000-0001-5595-7625</orcidid><orcidid>https://orcid.org/0000-0001-7479-3128</orcidid><orcidid>https://orcid.org/0000-0003-4614-9735</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Anisotropy Antiferromagnetism CoFeB/IrMn bilayer Coupling Crystal defects Domain walls Exchanging Ferromagnetic resonance Ferromagnetism four-fold magnetic anisotropy interfacial exchange coupling Magnetic anisotropy Magnetic domains Magnetic fields Magnetic switching Magnetism Nucleation Physics Single crystals |
| title | Fourfold magnetic anisotropy induced in CoFeB/IrMn bilayers by interfacial exchange coupling |
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