抄録
Studies of the angular dependence of the anisotropic magnetoresistance (AMR) are reported for epitaxial films of magnetite (Fe3 O4) grown on MgO(001) and also for single crystals of magnetite. The characteristic feature of the AMR is a twofold symmetry at temperatures above 200 K. As the samples are cooled below 200 K, an additional set of peaks appears. These become dominant at lower temperatures showing an overall fourfold symmetry. Observation of additional anisotropy in the AMR points to formation of charge ordering at much greater temperatures than the Verwey transition temperature and is possibly related to the polaron formation in magnetite.
本文言語 | English |
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論文番号 | 214402 |
ジャーナル | Physical Review B - Condensed Matter and Materials Physics |
巻 | 78 |
号 | 21 |
DOI | |
出版ステータス | Published - 2008 12月 1 |
外部発表 | はい |
ASJC Scopus subject areas
- 電子材料、光学材料、および磁性材料
- 凝縮系物理学