Magnetism and Electronic Structure in ZnFe$_2$O$_4$ and MnFe$_2$O$_4$

D. J. Singh; M. Gupta; R. Gupta

doi:10.1063/1.1453929

Magnetism and Electronic Structure in ZnFe$_2$O$_4$ and MnFe$_2$O$_4$

Condensed Matter 2009-11-07 v1

Authors: D. J. Singh , M. Gupta , R. Gupta

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Abstract

Density functional calculations are used to study magnetic and electronic properties of the spinel ferrites, ZnFe $_2$ O $_4$ and MnFe $_2$ O $_4$ . Correct magnetic orderings are obtained. ZnFe $_2$ O $_4$ is predicted to be a small gap insulator in agreement with experiment. MnFe $_2$ O $_4$ is found to be a low carrier density half-metal in the fully ordered state. However, strong effects on the electronic structure are found upon partial interchange of Fe and Mn atoms. This indicates that the insulating character may be due to Anderson localization associated with the intersite Mn-Fe disorder.

Keywords

density functional theory spinel ferrites ZnFe₂O₄ MnFe₂O₄ Anderson localization

Cite

@article{arxiv.cond-mat/0108176,
  title  = {Magnetism and Electronic Structure in ZnFe$_2$O$_4$ and MnFe$_2$O$_4$},
  author = {D. J. Singh and M. Gupta and R. Gupta},
  journal= {arXiv preprint arXiv:cond-mat/0108176},
  year   = {2009}
}

Comments

3 pages, submitted to mmm01 conference

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