Changes of Superconductivity and Crystal Structure on Ba_2YCu_3O_<7-x> by 1 MeV Ar^+ Ion Irradiation
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概要
- 論文の詳細を見る
Effects of 1 MeV Ar^+ ion irradiation on thin films of high-T_c oxide superconductor Ba_2YCu_3O_<7-x> (BYCO) were investigated in the fluence range between 1.7×10^<10> ions/cm^2 and 9.9×10^<13> ions/cm^2. Increase of transport critical current density (J_c) by irradiation was observed with a fluence below 1.3×10^<11> ions/cm^2, while the critical temperature (T_c) was unchanged in this fluence region. With a fluence above 3.4×10^&t;11> ions/cm^2, both T_c and J_c decreased with increasing fluence. Regarding the change of the crystal structure, expansion of the c-axis lattice constant and an increase of full width at half maximum (FWHM) value of the peak in X-ray diffraction were observed above a fluence of 1.0×10^<13> ions/cm^2. These results suggest that the radiation induced defects act as pinning centers in the low fluence region, and they cause the destruction of the crystal structure in the high fluence region.
- 社団法人応用物理学会の論文
- 1991-04-15
著者
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Takahashi Yoshihiro
Department Of Applied Physics School Of Engineering Tohoku University
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TAKAHASHI Yoichi
Department of Clinical Cariology and Endodontology, Showa University School of Dentistry
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Takahashi Y
Tanaka Solid Junction Project Erato Japan Science And Research Corporation
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Terai T
Univ. Tokyo Tokyo Jpn
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TERAI Takayuki
Department of Nuclear Engineering, Faculty of Engineering, University of Tokyo
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KUSAGAYA Kazuyuki
Department of Nuclear Engineering, Faculty of Engineering, University of Tokyo
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FURUTA Tai
Department of Nuclear Engineering, Faculty of Engineering, University of Tokyo
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MASEGI Tamaki
Department of Nuclear Engineering, Faculty of Engineering, University of Tokyo
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Masegi Tamaki
Department Of Nuclear Engineering Faculty Of Engineering University Of Tokyo
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KUSAGAYA Kazuyuki
Global Nuclear Fuel-Japan Co. , Ltd.
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Furuta T
Ntt Photonics Laboratories
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Kusagaya Kazuyuki
Global Nuclear Fuel-japan Co. Ltd.
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Takahashi Y
Department Of Molecular & Materials Sciences Kyushu University
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Takahashi Yoichi
Department Of Applied Chemistry Chuo University
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