Voltage control of magnetic anisotropy in Fe films with quantum well states
The influence of a gate voltage on magnetic anisotropy is investigated in a thin Fe film epitaxially grown on a Ag(1,1,10) substrate and covered by MgO. Oscillations in step-induced magnetic anisotropy due to quantum well states (QWS) confined in the Fe film are observed and shown to persist up to r...
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| Format: | Article |
| Language: | English |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/88663 https://orcid.org/0000-0002-9998-7276 |
| _version_ | 1811088970258317312 |
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| author | Bauer, Uwe Przybylski, Marek Beach, Geoffrey Stephen |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Bauer, Uwe Przybylski, Marek Beach, Geoffrey Stephen |
| author_sort | Bauer, Uwe |
| collection | MIT |
| description | The influence of a gate voltage on magnetic anisotropy is investigated in a thin Fe film epitaxially grown on a Ag(1,1,10) substrate and covered by MgO. Oscillations in step-induced magnetic anisotropy due to quantum well states (QWS) confined in the Fe film are observed and shown to persist up to room temperature at low Fe thicknesses. By systematically examining the voltage and thickness dependence of the magnetic hysteresis loop characteristics, we identify two distinct effects by which an applied voltage modifies the magnetic anisotropy. The first effect is due to voltage-induced changes to interfacial perpendicular magnetic anisotropy which, due to the vicinal geometry, leads to changes in the effective in-plane uniaxial magnetic anisotropy. A second effect is observed at lower film thicknesses and shows nonmonotonic voltage-induced effects on magnetic anisotropy. This nonmonotonic behavior coincides with the onset of significant QWS-induced effects on magnetic anisotropy and suggests a link between QWS- and voltage-induced anisotropy changes. |
| first_indexed | 2024-09-23T14:11:12Z |
| format | Article |
| id | mit-1721.1/88663 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:11:12Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/886632022-09-28T19:03:58Z Voltage control of magnetic anisotropy in Fe films with quantum well states Bauer, Uwe Przybylski, Marek Beach, Geoffrey Stephen Massachusetts Institute of Technology. Department of Materials Science and Engineering Bauer, Uwe Beach, Geoffrey Stephen The influence of a gate voltage on magnetic anisotropy is investigated in a thin Fe film epitaxially grown on a Ag(1,1,10) substrate and covered by MgO. Oscillations in step-induced magnetic anisotropy due to quantum well states (QWS) confined in the Fe film are observed and shown to persist up to room temperature at low Fe thicknesses. By systematically examining the voltage and thickness dependence of the magnetic hysteresis loop characteristics, we identify two distinct effects by which an applied voltage modifies the magnetic anisotropy. The first effect is due to voltage-induced changes to interfacial perpendicular magnetic anisotropy which, due to the vicinal geometry, leads to changes in the effective in-plane uniaxial magnetic anisotropy. A second effect is observed at lower film thicknesses and shows nonmonotonic voltage-induced effects on magnetic anisotropy. This nonmonotonic behavior coincides with the onset of significant QWS-induced effects on magnetic anisotropy and suggests a link between QWS- and voltage-induced anisotropy changes. National Science Foundation (U.S.) (Grant NSF-ECCS-1128439) 2014-08-11T16:19:03Z 2014-08-11T16:19:03Z 2014-05 2014-01 2014-07-23T20:49:25Z Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/88663 Bauer, Uwe, Marek Przybylski, and Geoffrey S. D. Beach. “Voltage Control of Magnetic Anisotropy in Fe Films with Quantum Well States.” Phys. Rev. B 89, no. 17 (May 2014). © 2014 American Physical Society https://orcid.org/0000-0002-9998-7276 en http://dx.doi.org/10.1103/PhysRevB.89.174402 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Bauer, Uwe Przybylski, Marek Beach, Geoffrey Stephen Voltage control of magnetic anisotropy in Fe films with quantum well states |
| title | Voltage control of magnetic anisotropy in Fe films with quantum well states |
| title_full | Voltage control of magnetic anisotropy in Fe films with quantum well states |
| title_fullStr | Voltage control of magnetic anisotropy in Fe films with quantum well states |
| title_full_unstemmed | Voltage control of magnetic anisotropy in Fe films with quantum well states |
| title_short | Voltage control of magnetic anisotropy in Fe films with quantum well states |
| title_sort | voltage control of magnetic anisotropy in fe films with quantum well states |
| url | http://hdl.handle.net/1721.1/88663 https://orcid.org/0000-0002-9998-7276 |
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