Sensitive Single-Level Magnetometers of High T<suB>c</suB> dc SQUIDS

Chin. Phys. Lett.

1995, Vol. 12

Issue (4): 229-232 DOI:

Original Articles

Sensitive Single-Level Magnetometers of High T_c dc SQUIDS

WANG Shiguang;DAI Yuandong;ZENG Xianghui;ZHENG Peihui, WANG Shouzheng;XIONG Guangcheng;LIAN Guijun;GAN Zizhao

Department of Physics, and Mesoscopic Physics Laboratory, Peking University, Beijing 100871

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WANG Shiguang, DAI Yuandong, ZENG Xianghui et al 1995 Chin. Phys. Lett. 12 229-232

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Abstract We have developed a simple sintering system to prepare the yttria-stabilized-zirconia (YSZ) bicrystals. Grain-boundary junctions made from the epitaxial YBa₂Cu₃O_7-δ films on the bicrystal substrates demonstrated Josephson behavior. Using new square washer design, single-level magnetometer of dc superconducting quantum interference. device (SQUID) has been fabricated. Owing to the flux focusing effect of the large washer, the magnetic field sensitivity of the devices has been enhanced. The magnetic field resolution of the magnetometer is IpT/Hz^1/2 at 10Hz, and increases to 3pT/Hz^1/2 at 1Hz at 77K.

Keywords: 74.40.+k 74.50.+r 85.25.-j

Published: 01 April 1995

PACS:	74.40.+k
	74.50.+r	(Tunneling phenomena; Josephson effects)
	85.25.-j	(Superconducting devices)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1995/V12/I4/0229

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	WANG Shiguang
	DAI Yuandong
	ZENG Xianghui
	ZHENG Peihui
	WANG Shouzheng
	XIONG Guangcheng
	LIAN Guijun
	GAN Zizhao

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