Electric-Field Modulation of Damping Constant in a Ferromagnetic Semiconductor (Ga,Mn)As

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Abstract

The modulation of the Gilbert damping constant α in (Ga,Mn)As by the application of an electric field is detected by ferromagnetic resonance measurements, where α increases with decreasing hole concentration. The smaller modulation of other magnetic parameters, such as magnetic anisotropy fields and Landé g factor, suggests that the modulation of α is governed by other effects rather than the spin-orbit coupling. Comparison of the conductivity dependence of α with that of the magnetization indicates that the magnetic disorder induced by carrier localization plays a major role in determining the magnitude of α in (Ga,Mn)As.

Original languageEnglish
Article number057204
JournalPhysical review letters
Volume115
Issue number5
DOIs
Publication statusPublished - 2015 Jul 30

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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