Cooperative behavior of the random and correlated pinning in Er123 films with columnar defects

Awaji, Satoshi*; Namba, Masashi*; Watanabe, Kazuo*; Ito, Shun*; Aoyagi, Eiji*; Kai, Hideki*; Mukaida, Masashi*; Okayasu, Satoru

The flux pinning behaviors for the heavy ion irradiated Er123 films are investigated based on the detailed $_{rm c}$ (, , ) properties. The double peaks of $_{rm p}$ curves for //c appear in case of the matching field of 0.3 T along -axis and 1.7 T tilted from -axis. In addition, the peaks on $_{rm c}$ () at = 0 $^{circ}$ (B//c), which originate from the columnar defects, decrease with increasing magnetic field but increase again near the irreversibility field. We found that the cooperation model of the -axis correlated and random pinning centers can describe the observed double peak behavior of $_{rm p}$ (B) and the angular dependence of $_{rm c}$ related to the correlated pinning.

Language	:	English
Journal	:	IEEE Transactions on Applied Superconductivity
Volume	:	21
Number	:	3
Pages	:	p.3192 - 3195
Publication Year/Month	:	2011/06
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Paper URL	:	https://doi.org/10.1109/TASC.2010.2089588
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Keywords	:	no keyword
Research Facility	:	タンデム加速器
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Registration No. : AA20130990
JAEA Abstracts No. :
Paper Submission No. : 14023

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