Thermal phase transformation of ZnO-based transparent ferromagnetic composite films and the change in magnetic characteristics

Tsutomu Shinagawa, Masanobu Izaki, Kuniaki Murase, Tomoya Uruga, Tetsuya Nakamura, Yasuyuki Matsumura, Yasuhiro Awakura

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Transparent ferromagnetic semiconducting composite Fe-Zn-O films composed of wurtzite ZnO matrix and Zn-incorporated magnetite particles have been prepared by novel chemical solution processes followed by thermal annealing, performed at different temperatures between 200 and 700°C under vacuum at around 5× 10-4 Pa. The effects of the thermal annealing on the structure and magnetic, electrical, and optical properties of the heterogranular transition metal oxides (Fe-Zn-O) films have been studied by using X-ray diffraction, X-ray absorption fine structure (XAFS), vibrating sample magnetometer, soft X-ray magnetic circular dichroism (SXMCD), and so on. These properties strongly depended on the annealing temperature and could be correlated to the changes in the ZnO matrix and/or the Zn-incorporated magnetite phase. The XAFS and SXMCD measurements using synchrotron radiation elucidated the growth process of the Zn-incorporated magnetite phase in the ZnO matrix.

Original languageEnglish
Pages (from-to)G168-G174
JournalJournal of the Electrochemical Society
Volume153
Issue number2
DOIs
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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