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Magnetic aftereffects in CoFeB/Ta/CoFeB spin valves of large area

Title
Magnetic aftereffects in CoFeB/Ta/CoFeB spin valves of large area
Author(s)
Morgunov, R.Lu, Y.Lavanant, M.Fache, T.Deveaux, X.Migot, S.Koplak, O.Talantsev, A.Mangin, S.
DGIST Authors
Morgunov, R.Lu, Y.Lavanant, M.Fache, T.Deveaux, X.Migot, S.Koplak, O.Talantsev, A.Mangin, S.
Issued Date
2017-08
Type
Article
Article Type
Article
Keywords
AlloysDiagramDomain WallDynamicsFerromagnetic NanoparticlesFilmsGlassesRemanent MagnetizationReversalSlow Relaxation
ISSN
2469-9950
Abstract
Magnetic aftereffect measurements on a synthetic antiferromagnet with strong perpendicular anisotropy are presented. Two types of magnetic transitions are observed in the CoFeB/Ta/CoFeB bilayer where the two ferromagnetic CoFeB layers are antiferromagnetically coupled: the transition from a parallel to an antiparallel CoFeB layers magnetization alignment and the transition between two possible antiparallel magnetization states. Magnetic relaxation measurements show a complete reversal in the case of the transition between the two antiferromagnetic configurations. The experimental data can be well fitted in the frame of extended exponential relaxation using the Fatuzzo-Labrune model. Consequently, the domain nucleation and domain-wall propagation can be studied as a function of temperature and applied field.
URI
http://hdl.handle.net/20.500.11750/4444
DOI
10.1103/PhysRevB.96.054421
Publisher
AMER PHYSICAL SOC
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Appears in Collections:
Global Center for Bio-Convergence Spin System 1. Journal Articles

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