Magnetic Anisotropy and ac Susceptibility of (Ga,Mn)As
J. Korean Phy. Soc. 2007; 50: 839~843
Published online March 15, 2007 © 2007 The Korean Physical Society.

Abstract
We studied the interplay of the biaxial and the uniaxial contributions to the in-plane magnetic anisotropy of (Ga,Mn)As epilayers through comprehensive dc and ac magnetic susceptibility measurements. Detailed information about the magnetic anisotropy was obtained from hysteresis curves recorded for various crystal orientations and from the temperature dependence of the magnetization. The measured orientations were the [110], [$-$110], and [100] directions. Ac susceptibility measurements were also conducted for these directions. We argue that the peaks in the real and the imaginary parts of the ac susceptibility cannot be explained within the single-domain spin-reorientation model.
Keywords: Magnetic anisotropy, ac susceptibility, Dilute magnetic semiconductor, (Ga,Mn)As


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