Structural Evolution of Fe Particles in Fe--Al2O3 Granular Films by Ar Ion Irradiations

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概要

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• Fe--Al2O3 granular films were prepared by helicon plasma sputtering. Fe64(Al2O3)36 in volume percent of as-prepared films was irradiated with 400 keV Ar ions in the fluence range of 1\times 10^{15}{\mbox{--}}5\times 10^{16} ions/cm2. The growth of Fe particles with increasing ion fluence was observed from X-ray diffraction (XRD) patterns, magnetization curves, and conversion electron Mössbauer (CEM) spectra. The magnetization curves and CEM spectra of as-prepared Fe--Al2O3 films indicated the superparamagnetic nature and the ferromagnetic nature with increasing ion fluence. In addition, the reduction of Fe3+ component to the Fe2+ and metallic Fe components by ion irradiation was observed from CEM spectra.

• 2013-01-25

著者

• Kinoshita Ryosuke

  Hosei University, Koganei, Tokyo 184-8584, Japan

• Toriyama Tamotsu

  Tokyo City University, Setagaya, Tokyo 158-8557, Japan

• Sakamoto Isao

  Hosei University, Koganei, Tokyo 184-8584, Japan

• Hayashi Nobuyuki

  Kurume Institute of Technology, Kurume, Fukuoka 830-0052, Japan

• Honda Shigeo

  Shimane University, Matsue 690-8504, Japan

• Ishida Tomoya

  Hosei University, Koganei, Tokyo 184-8584, Japan

• Koike Masaki

  National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan

• Nakayama Hiro

  Hosei University, Koganei, Tokyo 184-8584, Japan

• Purwanto Setyo

  PTBIN-BATAN, Kawasan PUSPITEK Serpong, Indonesia

• Yasumoto Masato

  National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan

関連論文

• Structural and Magnetic Properties of Fe and Au Ion-Implanted Al2O3 Single Crystals
• Hot-Spot Detection Model in Superconducting Nano-Stripline Detector for keV Ions
• Structural Evolution of Fe Particles in Fe--Al2O3 Granular Films by Ar Ion Irradiations

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