Study of Flux Pinning in Zone-melted YBCO by SQUID

Chin. Phys. Lett.

1993, Vol. 10

Issue (8): 496-499 DOI:

Original Articles

Study of Flux Pinning in Zone-melted YBCO by SQUID

JI Helin^1,2;SHI Zhixian^1,2;ZENG Zhaoyang^1,2;JIN Xin¹;YAO Xixian¹;FAN Zhanguo;SHAN Yuqiao

¹Department of Physics, and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210008 ²National Laboratory for Superconductivity, Institute of Physics, Academia Sinica, Beijiilg 100080 Department of Non-ferrous Metallurgy, Northeast Institute of Technology, Shenyang 110006

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JI Helin, SHI Zhixian, ZENG Zhaoyang et al 1993 Chin. Phys. Lett. 10 496-499

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Abstract Magnetic hysteresis loops arid magnetization relaxation of a zone-melted YBa₂Cu₃0_6+x sample were measured by superconducting quantum interference device (SQUID) at temperature from 4.5 to 70 K. The logarithmic behavior of magnetic decay at 4.5 K arid the gradual deviation as the temperature is increased demonstrated important role of nonlinear current density dependence of effective flux pinning potential U( J) in high temperature superconductors.

Keywords: 74.60.Ge 74.60.Mj

Published: 01 August 1993

PACS:	74.60.Ge
	74.60.Mj

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1993/V10/I8/0496

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	JI Helin
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	SHAN Yuqiao

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