論文

査読有り
2014年3月

Magnetic structures of FeTiO3-Fe2O3 solid solution thin films studied by soft X-ray magnetic circular dichroism and ab initio multiplet calculations

APPLIED PHYSICS LETTERS
  • H. Hojo
  • ,
  • K. Fujita
  • ,
  • H. Ikeno
  • ,
  • T. Matoba
  • ,
  • T. Mizoguchi
  • ,
  • I. Tanaka
  • ,
  • T. Nakamura
  • ,
  • Y. Takeda
  • ,
  • T. Okane
  • ,
  • K. Tanaka

104
11
開始ページ
112408
終了ページ
1
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1063/1.4868638
出版者・発行元
AMER INST PHYSICS

The solid solutions between ilmenite (FeTiO3) and hematite (alpha-Fe2O3) have recently attracted considerable attention as a spintronic material due to their interesting magnetic and electrical properties. In this study, the electronic and magnetic structures of epitaxially grown 0.6FeTiO(3).0.4Fe(2)O(3) solid solution thin films were investigated by combining x-ray absorption near-edge structure (XANES), x-ray magnetic circular dichroism (XMCD) for two different crystallographic projections, and first-principles theoretical calculations. The Fe L-edge XANES and XMCD spectra reveal that Fe is in the mixed-valent Fe (2+)-Fe3+ states while Fe2+ ions are mainly responsible for the magnetization. Moreover, the experimental Fe L-edge XANES and XMCD spectra change depending on the incident x-ray directions, and the theoretical spectra explain such spectral features. We also find a large orbital magnetic moment, which can originate the magnetic anisotropy of this system. On the other hand, although the valence state of Ti was interpreted to be 4+ from the Ti L-edge XANES, XMCD signals indicate that some electrons are present in the Ti-3d orbital, which are coupled antiparallel to the magnetic moment of Fe2+ ions. (C) 2014 AIP Publishing LLC.


リンク情報
DOI
https://doi.org/10.1063/1.4868638
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000333252300040&DestApp=WOS_CPL
ID情報
  • DOI : 10.1063/1.4868638
  • ISSN : 0003-6951
  • eISSN : 1077-3118
  • Web of Science ID : WOS:000333252300040

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