Room-temperature spin-orbit torque in NiMnSb
Materials that crystallize in diamond-related lattices, with Si and GaAs as their prime examples, are at the foundation of modern electronics. Simultaneously, inversion asymmetries in their crystal structure and relativistic spin-orbit coupling led to discoveries of non-equilibrium spin-polarization...
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| Autori principali: | , , , , , , , , , , , , , |
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| Lingua: | inglese |
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Nature Publishing Group
2019
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| Accesso online: | https://demo7.dspace.org/handle/123456789/441 |
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| _version_ | 1860822454870474754 |
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| author | Ciccarelli, Chiara Anderson, L Tshitoyan, V Ferguson, AJ Gerhard, F Gould, C Molenkamp, LW Gayles, J Železný, J Šámejkal, L Yuan, Z Sinova, J Freimuth, F Jungwirth, T |
| author_browse | Anderson, L Ciccarelli, Chiara Ferguson, AJ Freimuth, F Gayles, J Gerhard, F Gould, C Jungwirth, T Molenkamp, LW Sinova, J Tshitoyan, V Yuan, Z Šámejkal, L Železný, J |
| author_facet | Ciccarelli, Chiara Anderson, L Tshitoyan, V Ferguson, AJ Gerhard, F Gould, C Molenkamp, LW Gayles, J Železný, J Šámejkal, L Yuan, Z Sinova, J Freimuth, F Jungwirth, T |
| author_sort | Ciccarelli, Chiara |
| collection | DSpace |
| description | Materials that crystallize in diamond-related lattices, with Si and GaAs as their prime examples, are at the foundation of modern electronics. Simultaneously, inversion asymmetries in their crystal structure and relativistic spin-orbit coupling led to discoveries of non-equilibrium spin-polarization phenomena that are now extensively explored as an electrical means for manipulating magnetic moments in a variety of spintronic structures. Current research of these relativistic spin-orbit torques focuses primarily on magnetic transition-metal multilayers. The low-temperature diluted magnetic semiconductor (Ga, Mn)As, in which spin-orbit torques were initially discovered, has so far remained the only example showing the phenomenon among bulk non-centrosymmetric ferromagnets. Here we present a general framework, based on the complete set of crystallographic point groups, for identifying the potential presence and symmetry of spin-orbit torques in non-centrosymmetric crystals. Among the candidate room-temperature ferromagnets we chose to use NiMnSb, which is a member of the broad family of magnetic Heusler compounds. By performing all-electrical ferromagnetic resonance measurements in single-crystal epilayers of NiMnSb we detect room-temperature spin-orbit torques generated by effective fields of the expected symmetry and of a magnitude consistent with our ab initio calculations. |
| id | oai:localhost:123456789-441 |
| institution | DSPACE.FCHPT |
| language | English |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Nature Publishing Group |
| publisherStr | Nature Publishing Group |
| record_format | dspace |
| spelling | oai:localhost:123456789-4412021-04-07T16:30:12Z Room-temperature spin-orbit torque in NiMnSb Ciccarelli, Chiara Anderson, L Tshitoyan, V Ferguson, AJ Gerhard, F Gould, C Molenkamp, LW Gayles, J Železný, J Šámejkal, L Yuan, Z Sinova, J Freimuth, F Jungwirth, T Materials that crystallize in diamond-related lattices, with Si and GaAs as their prime examples, are at the foundation of modern electronics. Simultaneously, inversion asymmetries in their crystal structure and relativistic spin-orbit coupling led to discoveries of non-equilibrium spin-polarization phenomena that are now extensively explored as an electrical means for manipulating magnetic moments in a variety of spintronic structures. Current research of these relativistic spin-orbit torques focuses primarily on magnetic transition-metal multilayers. The low-temperature diluted magnetic semiconductor (Ga, Mn)As, in which spin-orbit torques were initially discovered, has so far remained the only example showing the phenomenon among bulk non-centrosymmetric ferromagnets. Here we present a general framework, based on the complete set of crystallographic point groups, for identifying the potential presence and symmetry of spin-orbit torques in non-centrosymmetric crystals. Among the candidate room-temperature ferromagnets we chose to use NiMnSb, which is a member of the broad family of magnetic Heusler compounds. By performing all-electrical ferromagnetic resonance measurements in single-crystal epilayers of NiMnSb we detect room-temperature spin-orbit torques generated by effective fields of the expected symmetry and of a magnitude consistent with our ab initio calculations. 2019-04-26T08:56:58Z 2019-04-26T08:56:58Z 16/05/16 https://demo7.dspace.org/handle/123456789/441 en Nature Publishing Group |
| spellingShingle | Ciccarelli, Chiara Anderson, L Tshitoyan, V Ferguson, AJ Gerhard, F Gould, C Molenkamp, LW Gayles, J Železný, J Šámejkal, L Yuan, Z Sinova, J Freimuth, F Jungwirth, T Room-temperature spin-orbit torque in NiMnSb |
| title | Room-temperature spin-orbit torque in NiMnSb |
| title_full | Room-temperature spin-orbit torque in NiMnSb |
| title_fullStr | Room-temperature spin-orbit torque in NiMnSb |
| title_full_unstemmed | Room-temperature spin-orbit torque in NiMnSb |
| title_short | Room-temperature spin-orbit torque in NiMnSb |
| title_sort | room temperature spin orbit torque in nimnsb |
| url | https://demo7.dspace.org/handle/123456789/441 |
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