In-plane uniaxial anisotropy rotations in (Ga,Mn)As thin films

Abstract

We show, by SQUID magnetometry, that in (Ga,Mn)As films the in-plane uniaxial magnetic easy axis is consistently associated with particular crystallographic directions and that it can be rotated from the [-110] direction to the [110] direction by low temperature annealing. We show that this behavior is hole-density-dependent and does not originate from surface anisotropy. The presence of uniaxial anisotropy as well its dependence on the hole-concentration and temperature can be explained in terms of the p-d Zener model of the ferromagnetism assuming a small trigonal distortion.

4 pages, 6 Postscript figures, uses revtex4

References in corpus (10)

• Hole-mediated ferromagnetism in tetrahedrally coordinated semiconductors
• Ferromagnetic semiconductors
• Mn Interstitial Diffusion in (Ga,Mn)As
• Giant Planar Hall Effect in Epitaxial (Ga,Mn)As Devices
• Theory of Magnetic Anisotropy in III_{1-x}Mn_{x}V Ferromagnets
• High Curie temperature GaMnAs obtained by resistance-monitored annealing
• Temperature Dependent Magnetic Anisotropy in (Ga,Ma)As Layers
• Temperature Dependent Magnetic Anisotropy in (Ga,Mn)As Layers
• High quality GaMnAs films grown with As dimers
• Magnetoresistance and Hall Effect in the Ferromagnetic Semiconductor GaMnAs

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