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An extensive comparison of anisotropies in MBE grown (Ga,Mn)As material

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arxiv 0802.4206 v1 pith:23LWXJN2 submitted 2008-02-28 cond-mat.mes-hall

C. Gould , S. Mark , K. Pappert , G. Dengel , J. Wenisch , R.P. Campion , A.W. Rushforth , D. Chiba
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Z. Li X. Liu W. Van Roy H. Ohno J.K. Furdyna B. Gallagher K. Brunner G. Schmidt L.W. Molenkamp
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classification cond-mat.mes-hall
keywords anisotropylayersanisotropiestermsuniaxialvariousadditionamplitude
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This paper reports on a detailed magnetotransport investigation of the magnetic anisotropies of (Ga,Mn)As layers produced by various sources worldwide. Using anisotropy fingerprints to identify contributions of the various higher order anisotropy terms, we show that the presence of both a [100] and a [110] uniaxial anisotropy in addition to the primary ([100] + [010]) anisotropy is common to all medium doped (Ga,Mn)As layers typically used in transport measurement, with the amplitude of these uniaxial terms being characteristic of the individual layers.

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