DC Field | Value | Language |
---|---|---|
dc.contributor.author | Akosa, Collins Ashu | ko |
dc.contributor.author | Kim, Won-Seok | ko |
dc.contributor.author | Bisig, Andre | ko |
dc.contributor.author | Klaeui, Mathias | ko |
dc.contributor.author | Lee, Kyung-Jin | ko |
dc.contributor.author | Manchon, Aurelien | ko |
dc.date.accessioned | 2020-11-23T04:10:08Z | - |
dc.date.available | 2020-11-23T04:10:08Z | - |
dc.date.created | 2020-11-18 | - |
dc.date.issued | 2015-03 | - |
dc.identifier.citation | PHYSICAL REVIEW B, v.91, no.9 | - |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.uri | http://hdl.handle.net/10203/277464 | - |
dc.description.abstract | Current-induced spin transfer torque and magnetization dynamics in the presence of spin diffusion in disordered magnetic textures is studied theoretically. We demonstrate using tight-binding calculations that weak, spin-conserving impurity scattering dramatically enhances the nonadiabaticity. To further explore this mechanism, a phenomenological drift-diffusion model for incoherent spin transport is investigated. We show that incoherent spin diffusion indeed produces an additional spatially dependent torque of the form similar to del(2)[m x (u . del)m] + xi del(2)[(u . del)m], where m is the local magnetization direction, u is the direction of injected current, and xi is a parameter characterizing the spin dynamics (precession, dephasing, and spin-flip). This torque, which scales as the inverse square of the domain wall width, only weakly enhances the longitudinal velocity of a transverse domain wall but significantly enhances the transverse velocity of vortex walls. The spatial-dependent spin transfer torque uncovered in this study is expected to have significant impact on the current-driven motion of abrupt two-dimensional textures such as vortices, skyrmions, and merons. | - |
dc.language | English | - |
dc.publisher | AMER PHYSICAL SOC | - |
dc.title | Role of spin diffusion in current-induced domain wall motion for disordered ferromagnets | - |
dc.type | Article | - |
dc.identifier.wosid | 000351341100003 | - |
dc.identifier.scopusid | 2-s2.0-84925868926 | - |
dc.type.rims | ART | - |
dc.citation.volume | 91 | - |
dc.citation.issue | 9 | - |
dc.citation.publicationname | PHYSICAL REVIEW B | - |
dc.identifier.doi | 10.1103/PhysRevB.91.094411 | - |
dc.contributor.localauthor | Lee, Kyung-Jin | - |
dc.contributor.nonIdAuthor | Akosa, Collins Ashu | - |
dc.contributor.nonIdAuthor | Kim, Won-Seok | - |
dc.contributor.nonIdAuthor | Bisig, Andre | - |
dc.contributor.nonIdAuthor | Klaeui, Mathias | - |
dc.contributor.nonIdAuthor | Manchon, Aurelien | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | RELAXATION | - |
dc.subject.keywordPlus | EXCITATION | - |
dc.subject.keywordPlus | DYNAMICS | - |
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