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Article Dans Une Revue Applied Physics Letters Année : 2012

Fast domain wall dynamics in MnAs/GaAs films

Résumé

Field-induced domain wall (DW) dynamics was investigated in MnAs/GaAs(100) films by means of longitudinal Kerr microscopy and a field pulse technique. Saw-tooth type domains were observed in the studied temperature range. DW velocities up to 950 m s −1 were measured at 200 K and up to 540 m s −1 at 290 K, at the beginning of the nucleation of the non-ferromagnetic β phase within the ferromagnetic α phase. Different propagation regimes were observed depending on the magnitude of the Walker field compared to the depinning field, which depends on the progressive nucleation of an unordered β phase. The results are interpreted in the framework of the one-dimensional model (1D) for DW propagation.
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Dates et versions

hal-01324068 , version 1 (31-05-2016)

Identifiants

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M Tortarolo, L. Thevenard, Hans Jürgen von Bardeleben, M Cubukcu, Victor H. Etgens, et al.. Fast domain wall dynamics in MnAs/GaAs films. Applied Physics Letters, 2012, 101, pp.072408. ⟨10.1063/1.4746381⟩. ⟨hal-01324068⟩
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