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The local structure around Ge atoms in Ge-doped magnetite thin films

High Temperature Materials and Processes, ISSN: 0334-6455, Vol: 39, Issue: 1, Page: 645-662
2020
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  • Citations
    2
    • Citation Indexes
      2

Article Description

Distribution of Ge atoms between tetrahedral and octahedral sites in the spinel-type structure of Fe2.64Ge0.36O4 thin films fabricated by radio frequency sputtering with a composite target of magnetite and Ge has been investigated by extended X-ray absorption fine structure analysis. The local structural changes around the Ge atoms in the films induced by annealing at 573 and 873 K are discussed through comparison of the local structure for sintered crystalline Fe2.7Ge0.3O4 in which Ge atoms preferentially located at the tetrahedral site of the spinel-type structure. This work provides successful information on the structural change with magnetic property of the thin films as follows: the Ge atoms statistically distributed at the tetrahedral and octahedral sites of the as-synthesized films and preferentially occupied the tetrahedral site by annealing at 873 K corresponding to the increase in magnetization.

Bibliographic Details

Kozo Shinoda; Seishi Abe; Yoshio Waseda; Kazumasa Sugiyama

Walter de Gruyter GmbH

Materials Science; Physics and Astronomy; Engineering; Chemistry

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