Noncollinear spin states and competing interactions in half-metals

Authors

Ralph Skomski, University of Nebraska-LincolnFollow
Jian Zhou, University of Nebraska-Lincoln
Peter A. Dowben, University of Nebraska-LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Date of this Version

November 2004

Comments

Published Journal of Applied Physics 97 (2005) 10C305. Permission to use.

Abstract

The high-field spin structure of magnetic perovskites and related magnetoresistive materials is investigated by model calculations. Competing exchange as well as real-structure-dependent random field, random anisotropy, and Dzyaloshinskii–Moriya interactions yield a noncollinear magnetic structure that may be called a spin colloid. The noncollinear structure, which contributes to the zero- and finite-temperature spin mixing and reduces the magnetoresistance, is strongly field dependent. © 2005 American Institute of Physics. [DOI: 10.1063/1.1851412]