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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2016

Strong reduction of the coercivity by a surface acoustic wave in an out-of-plane magnetized epilayer

Résumé

Inverse magnetostriction is the effect by which magnetization can be changed upon application of stress/strain. A strain modulation may be created electrically by exciting interdigitated transducers to generate surface acoustic waves (SAWs). Hence SAWs appear as a possible route towards induction-free undulatory magnetic data manipulation. Here we demonstrate experimentally on an out-of-plane magnetostrictive layer a reduction of the coercive field of up to 60% by a SAW, over millimetric distances. A simple model shows that this spectacular effect can be partly explained by the periodic lowering of the strain-dependent domain nucleation energy by the SAW. This proof of concept was done on (Ga,Mn)(As,P), a magnetic semiconductor in which the out-of-plane magnetic anisotropy can be made very weak by epitaxial growth; it should guide material engineering for all-acoustic magnetization switching.
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Dates et versions

hal-01438587 , version 1 (17-01-2017)

Identifiants

Citer

L. Thevenard, I S Camara, J.-y Prieur, P Rovillain, A Lemaître, et al.. Strong reduction of the coercivity by a surface acoustic wave in an out-of-plane magnetized epilayer. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016, 93, pp.140405. ⟨10.1103/PhysRevB.93.140405⟩. ⟨hal-01438587⟩
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