Noncollinear Ferromagnetism in (III,Mn)V Semiconductors

John Schliemann and A. H. MacDonald
Phys. Rev. Lett. 88, 137201 – Published 14 March 2002
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Abstract

We investigate the stability of the collinear ferromagnetic state in kinetic exchange models for (III,Mn)V semiconductors with randomly distributed Mn ions. Our results suggest that noncollinear ferromagnetism is common to these semiconductor systems. The instability of the collinear state is due to long-range fluctuations involving a large fraction of the localized magnetic moments. We address conditions that favor the occurrence of noncollinear ground states and discuss unusual behavior that we predict for the temperature and field dependence of its saturation magnetization.

  • Received 27 July 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.137201

©2002 American Physical Society

Authors & Affiliations

John Schliemann and A. H. MacDonald

  • Department of Physics, The University of Texas, Austin, Texas 78712
  • Department of Physics, Indiana University, Bloomington, Indiana 47405

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Vol. 88, Iss. 13 — 1 April 2002

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