低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
研究論文
重イオン照射Er123膜における相関ピンニング特性
淡路 智難波 雅史渡辺 和雄甲斐 英樹向田 昌志岡安 悟
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2009 年 44 巻 12 号 p. 529-534

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We measured the transport critical current densities in high magnetic fields up to 17 T for Er123 films irradiated by 200MeV Au ion with the matching field of 0.1 T and 1 T along c-axis and 1 T for 23° tilting from c-axis. The angular dependence of critical current density suggests that the c-axis correlated pinning centers is effective even in much higher magnetic field than its matching field. In addition, we found that the peak of the flux pinning force density (Fp) curves related with the matching field of the columnar defects. The temperature scaling behavior of Fp in field along the defect direction was observed only in low field region below the matching field. Therefore, the c-axis correlated pinning is dominant in low field region. In higher magnetic field than the matching field, however, the c-axis correlated pinning works cooperatively with the background random pinning as well.

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© 2009 公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)
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