YBa2Cu3O7 Bicrystal Josephson Junctions and dc SQUIDs

Chin. Phys. Lett.

1996, Vol. 13

Issue (5): 390-393 DOI:

Original Articles

YBa₂Cu₃O₇ Bicrystal Josephson Junctions and dc SQUIDs

Yu. V. Kislinskii¹;ZHAO Bai-ru;WU Pei-jun;PENG Zhi-qiang;CHEN Ying-fei;YANG Tao;CHEN Lie;SUN Ji-jun;XU Bo;WU Fei;ZHOU Yue-liang;LI Lin;ZHAO Zhong-xian;E. A. Stepantsov²

Institute of physics, Chinese Academy of Sciences, Beijing 100080 ¹Permanent address : Institute of Crystallography, 117333, Moscow, Russia ²Institute of Crystallography, 117333, Moscow, Russia

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Yu. V. Kislinskii, ZHAO Bai-ru, WU Pei-jun et al 1996 Chin. Phys. Lett. 13 390-393

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Abstract Bicrystal Josephson junctions and direct current superconducting quantum interference devices ( dc SQUIDs) were prepares on YBa₂Cu₃O₇( YBCO ) thin films deposited on yttrium stabilized ZrO₂ bicrystal substrates The critical current densities J_c ~ 2 X 10⁶ A/cm² for YBCO thin film and (1 - 3 ) X 10³ A/cm² at boundaries were obtained at 77K. For YBCO Josephson junction made on 28°misorientated boundary, the Shapiro steps were observed. The dc SQUID was made on the 32° misorientated boundary junctions, which consisted of 40 X 40μm of loop and 2000 X 2000μm planar superconductive flux focuser. The voltage modulation depth of this SQUID was 6μV, and the magnetic field sensitivity was estimated to be ~ 2pT /√Hz from the measured noise level.

Keywords: 74.50.+r 74.76.Bz 74.90.+n

Published: 01 May 1996

PACS:	74.50.+r	(Tunneling phenomena; Josephson effects)
	74.76.Bz
	74.90.+n	(Other topics in superconductivity)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1996/V13/I5/0390

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	Yu. V. Kislinskii
	ZHAO Bai-ru
	WU Pei-jun
	PENG Zhi-qiang
	CHEN Ying-fei
	YANG Tao
	CHEN Lie
	SUN Ji-jun
	XU Bo
	WU Fei
	ZHOU Yue-liang
	LI Lin
	ZHAO Zhong-xian
	E. A. Stepantsov

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