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Department of Materials Science and Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
Department Materials Science, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
Department Materials Science, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8603, Japan
Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry, Nagasaka, Yokosuka, Kanagawa 240-0196, Japan
Graduate School of Science and Technology, Shizuoka University, Hamamatsu, Shizuoka 432-8651, Japan
Department of Applied Chemistry, University of Tokyo, Tokyo 113-8656, Japan
Department of Material Science and Engineering, Kyushu University, Fukuoka 819-0395, Japan
抄録
Magnetic field dependences of the glass-liquid transition temperature (Tg) were studied in YBa2Cu3O7−x films containing various types of nanoinclusions. The vortex configuration entangled or straight and pinning strength for each vortex are crucial to the behaviors of Tg. c-axis correlated pinning centers optimize these factors and achieve the upper limit of Tg, which is determined by loss of line tension of vortices, if they are elongated through a thickness of a sample. By optimizing pinning centers, critical temperature, and a matching field, a Tg value of 77 K can be obtained in YBa2Cu3O7−x in a magnetic field as high as 27 T.
雑誌名
Physical review B. Condensed matter and materials physics
巻
79
号
9
ページ
092504-1 - 092504-4
発行年
2009-03-10
出版者
Published by the American Physical Society through the American Institute of Physics
Control of the glass-liquid transition temperature in YBa2Cu3O7-x films
PRB79_092504.pdf
(365.74KB)
