Phys. Rev. B 73, 233303 (2006) [4 pages]Giant anisotropy in x-ray magnetic linear dichroism in (Ga,Mn)AsReceived 7 April 2006; published 9 June 2006 Hugely anisotropic Mn L2,3 x-ray magnetic linear dichroism (XMLD) is reported for the ferromagnetic semiconductor (Ga,Mn)As. The sign, magnitude, and line shape of the dichroism changes with azimuthal rotation of the samples between the in-plane ⟨110⟩ and ⟨100⟩ directions. The strong anisotropy is confirmed by multiplet calculations for a Mn 3d5 configuration where charge anisotropy and magnetocrystalline anisotropy are absent. This allows a precise determination of the Mn 3d crystal-field splitting, and establishes the anisotropy in the XMLD as a general feature for localized moment systems with crystal-field symmetry. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.73.233303
DOI:
10.1103/PhysRevB.73.233303
PACS:
75.50.Pp, 75.25.+z, 75.30.Gw
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