Development of ferromagnetic oxide semiconductor thin films towards spintronics applications

K. Fujita, H. Hojo, T. Matoba, K. Hirao, K. Tanaka

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Epitaxial thin films of ilmenite-hematite solid solutions with compositions of xFeTiO3-(l - x)Fe2O3 (x=0.8, 0.7, and 0.6) (in molar ratio) have been grown on α-Al2O3 (0001) substrates utilizing a pulsed laser deposition (PLD) technique, and their electrical and magnetic properties have been examined. By precisely controlling the deposition conditions such as oxygen partial pressure and substrate temperature, a single phase of well-ordered solid solutions can be obtained irrespective of the compositions. The ordered-phase thin films show ferrimagnetic properties, and the Curie temperature (Tc) is 270, 400, and over 400 K at the compositions of x=0.S, 0.7, and 0.6, respectively. The ordered-phase thin films are also semiconducting, while the conduction type changes from p- to n-types as x is decreased from 0.8 to 0.6. The Hall effect measurements at room temperature suggest the spin polarization of charged carriers.

本文言語英語
ホスト出版物のタイトルMaterials Science and Technology Conference and Exhibition MS and T'08
ページ134-143
ページ数10
出版ステータス出版済み - 12 1 2008
外部発表はい
イベントMaterials Science and Technology Conference and Exhibition, MS and T'08 - Pittsburgh, PA, 米国
継続期間: 10 5 200810 9 2008

出版物シリーズ

名前Materials Science and Technology Conference and Exhibition, MS and T'08
1

その他

その他Materials Science and Technology Conference and Exhibition, MS and T'08
Country米国
CityPittsburgh, PA
Period10/5/0810/9/08

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials

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