Metal-doped magnetite thin films

Seishi Abe, De Hai Ping, Shintaro Nakamura, Masato Ohnuma, Shigehiro Ohnuma

研究成果: ジャーナルへの寄稿学術論文査読

4 被引用数 (Scopus)

抄録

This paper investigates magnetite (Fe 3O 4) thin film containing a small amount of a metal element. The films are prepared by rf sputtering with a composite target of ceramic iron oxide with metal chips. Low-temperature magnetization of magnetite containing 5.3%Ge reveals that the film contains some magnetically weak coupling grains. The metal element Mg reduces both hematite (α-Fe 2O 3) and magnetite, resulting in single-phase wüstite (Fe 1-xO). In contrast, adding Ge selectively reduces hematite, while magnetite remains unreactive. According to the free energy of reaction, the element Ge is able to reduce hematite only, whereas the element Mg is capable of reducing both hematite and magnetite. This property is in good agreement with the experiment results.

本文言語英語
ページ(範囲)5087-5090
ページ数4
ジャーナルJournal of Nanoscience and Nanotechnology
12
6
DOI
出版ステータス出版済み - 2012

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