Finite size effects in the Verwey transition of magnetite thin films

Alexandre Bataille; Eric Vincent; Susana Gota; Martine Gautier-Soyer

Finite size effects in the Verwey transition of magnetite thin films

Strongly Correlated Electrons 2007-05-23 v1 Materials Science

Authors: Alexandre Bataille , Eric Vincent , Susana Gota , Martine Gautier-Soyer

Abstract

We report on the finite size effects in the Verwey transition of stress-free magnetite Fe3O4 thin films. A limit thickness of 20 nm is evidenced, above which the transition temperature TV is constant and close to 120 K (bulk value) and below which no genuine transition is observed. Field Cooled and Zero Field Cooled measurements evidence irreversibilities for all thicknesses. This irreversible behavior abruptly disappears around TV for the thicker films, when the magnetic anisotropy vanishes. These behaviors are interpreted in terms of assemblies of interacting magnetic Fe3O4 clusters, which are smaller than the antiphase domains present in the films.

Keywords

magnetite Verwey transition finite size effects thin films Fe3O4 magnetic anisotropy

Cite

@article{arxiv.cond-mat/0610291,
  title  = {Finite size effects in the Verwey transition of magnetite thin films},
  author = {Alexandre Bataille and Eric Vincent and Susana Gota and Martine Gautier-Soyer},
  journal= {arXiv preprint arXiv:cond-mat/0610291},
  year   = {2007}
}

Finite size effects in the Verwey transition of magnetite thin films

Abstract

Keywords

Cite

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