Fast domain wall dynamics in MnAs/GaAs films | Zendy

M. Tortarolo | Zendy; L. Thevenard | Zendy; H. J. von Bardeleben | Zendy; M. Cubukcu | Zendy; V. H. Etgens | Zendy; M. Eddrief | Zendy; C. Gourdon | Zendy

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Fast domain wall dynamics in MnAs/GaAs films

Author(s) -

M. Tortarolo,

L. Thevenard,

H. J. von Bardeleben,

M. Cubukcu,

V. H. Etgens,

M. Eddrief,

C. Gourdon

Publication year - 2012

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4746381

Subject(s) - nucleation , condensed matter physics , ferromagnetism , phase (matter) , field (mathematics) , domain wall (magnetism) , materials science , kerr effect , magnetic field , physics , magnetization , thermodynamics , quantum mechanics , nonlinear system , pure mathematics , mathematics

International audienceField-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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