Anisotropic magnetoresistance effect of a strong ferromagnet: magnetization direction dependence in a model with crystal field
We theoretically study magnetization direction dependence of the anisotropic magnetoresistance (AMR) effect of a strong ferromagnet. We here use the two‐current model which takes into account the s –d scattering, where s (d) is the conduction state (the localized d states). The d states have the spi...
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| Veröffentlicht in: | Physica status solidi. C 2014-05, Vol.11 (5-6), p.1026-1032 |
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| creator | Kokado, Satoshi Tsunoda, Masakiyo |
| description | We theoretically study magnetization direction dependence of the anisotropic magnetoresistance (AMR) effect of a strong ferromagnet. We here use the two‐current model which takes into account the s –d scattering, where s (d) is the conduction state (the localized d states). The d states have the spin–orbit interaction, exchange field, and crystal field of tetragonal symmetry. From the model, we derive analytic expressions of twofold and fourfold symmetric terms of the AMR ratio. The dominant component in the twofold symmetric term is proportional to the difference of partial density‐of‐states (DOS) at the Fermi energy (EF) between dγ and dε orbitals. The fourfold symmetric term is proportional to the difference of partial DOS at EF among dε orbitals. In addition, using the expressions, we analyze an experimental result of the AMR ratio of Fe4N. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
| doi_str_mv | 10.1002/pssc.201300736 |
| format | Article |
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We here use the two‐current model which takes into account the s –d scattering, where s (d) is the conduction state (the localized d states). The d states have the spin–orbit interaction, exchange field, and crystal field of tetragonal symmetry. From the model, we derive analytic expressions of twofold and fourfold symmetric terms of the AMR ratio. The dominant component in the twofold symmetric term is proportional to the difference of partial density‐of‐states (DOS) at the Fermi energy (EF) between dγ and dε orbitals. The fourfold symmetric term is proportional to the difference of partial DOS at EF among dε orbitals. In addition, using the expressions, we analyze an experimental result of the AMR ratio of Fe4N. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</description><identifier>ISSN: 1862-6351</identifier><identifier>EISSN: 1610-1642</identifier><identifier>DOI: 10.1002/pssc.201300736</identifier><language>eng</language><publisher>Berlin: WILEY-VCH Verlag</publisher><subject>crystal field ; Crystals ; Density of states ; Fermi surfaces ; Ferromagnetism ; Magnetization ; Magnetoresistance ; Magnetoresistivity ; Orbitals ; perturbation theory ; resistivity ; s −d scattering ; spin−orbit interaction</subject><ispartof>Physica status solidi. C, 2014-05, Vol.11 (5-6), p.1026-1032</ispartof><rights>Copyright © 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</rights><rights>Copyright © 2014 WILEY-VCH Verlag GmbH & Co. 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Status Solidi C</addtitle><description>We theoretically study magnetization direction dependence of the anisotropic magnetoresistance (AMR) effect of a strong ferromagnet. We here use the two‐current model which takes into account the s –d scattering, where s (d) is the conduction state (the localized d states). The d states have the spin–orbit interaction, exchange field, and crystal field of tetragonal symmetry. From the model, we derive analytic expressions of twofold and fourfold symmetric terms of the AMR ratio. The dominant component in the twofold symmetric term is proportional to the difference of partial density‐of‐states (DOS) at the Fermi energy (EF) between dγ and dε orbitals. The fourfold symmetric term is proportional to the difference of partial DOS at EF among dε orbitals. In addition, using the expressions, we analyze an experimental result of the AMR ratio of Fe4N. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</description><subject>crystal field</subject><subject>Crystals</subject><subject>Density of states</subject><subject>Fermi surfaces</subject><subject>Ferromagnetism</subject><subject>Magnetization</subject><subject>Magnetoresistance</subject><subject>Magnetoresistivity</subject><subject>Orbitals</subject><subject>perturbation theory</subject><subject>resistivity</subject><subject>s −d scattering</subject><subject>spin−orbit interaction</subject><issn>1862-6351</issn><issn>1610-1642</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqFkT1vFDEQhlcRkQiBltpSGpo9_LG2d-migyRIASKOj9Ly2uPgsGcv9p6SS5HfHh8bRYgm1UzxPK9m9FbVa4IXBGP6dszZLCgmDGPJxF51QATBNRENfVb2VtBaME6eVy9yvsKYcUzEQXV3HHyOU4qjN2itLwNMMUH2edLBAALnwEwoOqRRLlS4RA5SijP57sHwt3ryMSDrU6H_bjBCsLCL8KG462hhQNd--oVM2pbwATkPg31Z7Ts9ZHj1MA-r7ycfvi3P6vMvpx-Xx-e1YW0ratvzpnVOGGt6RgW1PbVMc9s35V8pWN9JiTvT9o5pwp2zTeNw54ztGCO0A3ZYvZlzxxT_bCBPau2zgWHQAeImKyIk4ZTzDhf06D_0Km5SKNepHSI5bwkv1GKmTIo5J3BqTH6t01YRrHZ1qF0d6rGOInSzcO0H2D5Bq4vVavmvW89uqQVuHl2dfishmeTq5-dT9X4lf5BPZ0v1ld0D-_Ogvw</recordid><startdate>201405</startdate><enddate>201405</enddate><creator>Kokado, Satoshi</creator><creator>Tsunoda, Masakiyo</creator><general>WILEY-VCH Verlag</general><general>WILEY‐VCH Verlag</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>201405</creationdate><title>Anisotropic magnetoresistance effect of a strong ferromagnet: magnetization direction dependence in a model with crystal field</title><author>Kokado, Satoshi ; Tsunoda, Masakiyo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3886-db548ff6cdcb3262db2d3a5db4201763b97709c8bf3a15ffd44f09fcd933129e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>crystal field</topic><topic>Crystals</topic><topic>Density of states</topic><topic>Fermi surfaces</topic><topic>Ferromagnetism</topic><topic>Magnetization</topic><topic>Magnetoresistance</topic><topic>Magnetoresistivity</topic><topic>Orbitals</topic><topic>perturbation theory</topic><topic>resistivity</topic><topic>s −d scattering</topic><topic>spin−orbit interaction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kokado, Satoshi</creatorcontrib><creatorcontrib>Tsunoda, Masakiyo</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physica status solidi. C</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kokado, Satoshi</au><au>Tsunoda, Masakiyo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Anisotropic magnetoresistance effect of a strong ferromagnet: magnetization direction dependence in a model with crystal field</atitle><jtitle>Physica status solidi. C</jtitle><addtitle>Phys. Status Solidi C</addtitle><date>2014-05</date><risdate>2014</risdate><volume>11</volume><issue>5-6</issue><spage>1026</spage><epage>1032</epage><pages>1026-1032</pages><issn>1862-6351</issn><eissn>1610-1642</eissn><abstract>We theoretically study magnetization direction dependence of the anisotropic magnetoresistance (AMR) effect of a strong ferromagnet. We here use the two‐current model which takes into account the s –d scattering, where s (d) is the conduction state (the localized d states). The d states have the spin–orbit interaction, exchange field, and crystal field of tetragonal symmetry. From the model, we derive analytic expressions of twofold and fourfold symmetric terms of the AMR ratio. The dominant component in the twofold symmetric term is proportional to the difference of partial density‐of‐states (DOS) at the Fermi energy (EF) between dγ and dε orbitals. The fourfold symmetric term is proportional to the difference of partial DOS at EF among dε orbitals. In addition, using the expressions, we analyze an experimental result of the AMR ratio of Fe4N. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</abstract><cop>Berlin</cop><pub>WILEY-VCH Verlag</pub><doi>10.1002/pssc.201300736</doi><tpages>7</tpages></addata></record> |
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| identifier | ISSN: 1862-6351 |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | crystal field Crystals Density of states Fermi surfaces Ferromagnetism Magnetization Magnetoresistance Magnetoresistivity Orbitals perturbation theory resistivity s −d scattering spin−orbit interaction |
| title | Anisotropic magnetoresistance effect of a strong ferromagnet: magnetization direction dependence in a model with crystal field |
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