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| Pàgina inicial > Articles > Articles publicats > Reversible and magnetically unassisted voltage-driven switching of magnetization in FeRh/PMN-PT |
(Institut de Ciència de Materials de Barcelona) (Universitat Autònoma de Barcelona. Departament de Física) (Institut de Ciència de Materials de Barcelona) (ALBA Laboratori de Llum de Sincrotró) (ALBA Laboratori de Llum de Sincrotró) (Universitat Autònoma de Barcelona. Departament de Física) (Institut de Ciència de Materials de Barcelona)
| Data: | 2018 |
| Resum: | Reversible control of magnetization by electric fields without assistance from a subsidiary magnetic field or electric current could help reduce the power consumption in spintronic devices. When increasing temperature above room temperature, FeRh displays an uncommon antiferromagnetic to ferromagnetic phase transition linked to a unit cell volume expansion. Thus, using the strain exerted by an adjacent piezoelectric layer, the relative amount of antiferromagnetic and ferromagnetic regions can be tuned by an electric field applied to the piezoelectric material. Indeed, large variations in the saturation magnetization have been observed when straining FeRh films grown on suitable piezoelectric substrates. In view of its applications, the variations in the remanent magnetization rather than those of the saturation magnetization are the most relevant. Here, we show that in the absence of any bias external magnetic field, permanent and reversible magnetization changes as high as 34% can be induced by an electric field, which remain after this has been zeroed. Bulk and local magnetoelectric characterization reveals that the fundamental reason for the large magnetoelectric response observed at remanence is the expansion (rather than the nucleation) of ferromagnetic nanoregions. |
| Ajuts: | European Commission 648454 Ministerio de Economía y Competitividad MAT2014-56063-C2-1-R Ministerio de Economía y Competitividad MAT2015-73839-JIN Ministerio de Economía y Competitividad MAT2014-51778-C2-1-R Ministerio de Economía y Competitividad MAT2015-64110-C2-2-R Ministerio de Economía y Competitividad MAT2017-86357-C3-1-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1377 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-292 European Commission 766566 European Commission 268066 Ministerio de Economía y Competitividad SEV-2015-0496 Ministerio de Economía y Competitividad RYC-2017-22531 |
| Drets: | Tots els drets reservats.  |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió acceptada per publicar |
| Matèria: | Multiferroic ; Magnetoelectric ; Thin film ; Piezoelectric ; FeRh |
| Publicat a: | Applied physics letters, Vol. 113, Issue 15 (October 2018) , art. 152901, ISSN 1077-3118 |
14 p, 542.4 KB |
