Determination of spin torque efficiencies in heterostructures with perpendicular magnetic anisotropy
We report that by measuring a current-induced hysteresis loop shift versus in-plane bias magnetic field, the spin-Hall effect (SHE) contribution of the current-induced effective field per current density χ[subscript SHE] can be estimated for Pt- and Ta-based magnetic heterostructures with perpendicu...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2016
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| Online Access: | http://hdl.handle.net/1721.1/102241 https://orcid.org/0000-0002-6858-8424 https://orcid.org/0000-0002-8719-2652 |
| _version_ | 1811081991702970368 |
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| author | Pai, Chi-Feng Tan, Aik Jun Mann, Maxwell S. 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 Pai, Chi-Feng Tan, Aik Jun Mann, Maxwell S. Beach, Geoffrey Stephen |
| author_sort | Pai, Chi-Feng |
| collection | MIT |
| description | We report that by measuring a current-induced hysteresis loop shift versus in-plane bias magnetic field, the spin-Hall effect (SHE) contribution of the current-induced effective field per current density χ[subscript SHE] can be estimated for Pt- and Ta-based magnetic heterostructures with perpendicular magnetic anisotropy. We apply this technique to a Pt-based sample with its ferromagnetic (FM) layer being wedged deposited and discover an extra effective field contribution χ[subscript Wedged] due to the asymmetric nature of the deposited FM layer. We confirm the correlation between χ[subscript Wedged] and the asymmetric depinning process in FM layer during magnetization switching by magneto-optical Kerr microscopy. These results indicate the possibility of engineering deterministic spin-orbit torque switching by controlling the symmetry of domain expansion through the materials growth process. |
| first_indexed | 2024-09-23T11:55:39Z |
| format | Article |
| id | mit-1721.1/102241 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:55:39Z |
| publishDate | 2016 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1022412022-10-01T07:03:43Z Determination of spin torque efficiencies in heterostructures with perpendicular magnetic anisotropy Pai, Chi-Feng Tan, Aik Jun Mann, Maxwell S. Beach, Geoffrey Stephen Massachusetts Institute of Technology. Department of Materials Science and Engineering Pai, Chi-Feng Mann, Maxwell S. Tan, Aik Jun Beach, Geoffrey Stephen We report that by measuring a current-induced hysteresis loop shift versus in-plane bias magnetic field, the spin-Hall effect (SHE) contribution of the current-induced effective field per current density χ[subscript SHE] can be estimated for Pt- and Ta-based magnetic heterostructures with perpendicular magnetic anisotropy. We apply this technique to a Pt-based sample with its ferromagnetic (FM) layer being wedged deposited and discover an extra effective field contribution χ[subscript Wedged] due to the asymmetric nature of the deposited FM layer. We confirm the correlation between χ[subscript Wedged] and the asymmetric depinning process in FM layer during magnetization switching by magneto-optical Kerr microscopy. These results indicate the possibility of engineering deterministic spin-orbit torque switching by controlling the symmetry of domain expansion through the materials growth process. National Science Foundation (U.S.) (NSF-ECCS-1408172) 2016-04-15T14:48:16Z 2016-04-15T14:48:16Z 2016-04 2016-01 2016-04-08T22:00:04Z Article http://purl.org/eprint/type/JournalArticle 2469-9950 2469-9969 http://hdl.handle.net/1721.1/102241 Pai, Chi-Feng, Maxwell Mann, Aik Jun Tan, and Geoffrey S. D. Beach. “Determination of Spin Torque Efficiencies in Heterostructures with Perpendicular Magnetic Anisotropy.” Physical Review B 93, no. 14 (April 8, 2016). © 2016 American Physical Society https://orcid.org/0000-0002-6858-8424 https://orcid.org/0000-0002-8719-2652 en http://dx.doi.org/10.1103/PhysRevB.93.144409 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 | Pai, Chi-Feng Tan, Aik Jun Mann, Maxwell S. Beach, Geoffrey Stephen Determination of spin torque efficiencies in heterostructures with perpendicular magnetic anisotropy |
| title | Determination of spin torque efficiencies in heterostructures with perpendicular magnetic anisotropy |
| title_full | Determination of spin torque efficiencies in heterostructures with perpendicular magnetic anisotropy |
| title_fullStr | Determination of spin torque efficiencies in heterostructures with perpendicular magnetic anisotropy |
| title_full_unstemmed | Determination of spin torque efficiencies in heterostructures with perpendicular magnetic anisotropy |
| title_short | Determination of spin torque efficiencies in heterostructures with perpendicular magnetic anisotropy |
| title_sort | determination of spin torque efficiencies in heterostructures with perpendicular magnetic anisotropy |
| url | http://hdl.handle.net/1721.1/102241 https://orcid.org/0000-0002-6858-8424 https://orcid.org/0000-0002-8719-2652 |
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