Half-magnetization plateau stabilized by structural distortion in the antiferromagnetic Heisenberg model on a pyrochlore lattice
Strongly Correlated Electrons
2009-11-10 v1 Materials Science
Abstract
Magnetization plateaus, visible as anomalies in magnetic susceptibility at low temperatures, are one of the hallmarks of frustrated magnetism. We show how an extremely robust half-magnetization plateau can arise from coupling between spin and lattice degrees of freedom in a pyrochlore antiferromagnet, and develop a detailed symmetry of analysis of the simplest possible scenario for such a plateau state. The application of this theory to the spinel oxides CdCr2O4 and HgCr2O4, where a robust half magnetization plateau has been observed, is discussed.
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Cite
@article{arxiv.cond-mat/0408397,
title = {Half-magnetization plateau stabilized by structural distortion in the antiferromagnetic Heisenberg model on a pyrochlore lattice},
author = {K. Penc and N. Shannon and H. Shiba},
journal= {arXiv preprint arXiv:cond-mat/0408397},
year = {2009}
}
Comments
4 pages, 4 figures