Chin. Phys. Lett.  1995, Vol. 12 Issue (4): 229-232    DOI:
Original Articles |
Sensitive Single-Level Magnetometers of High Tc 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 YBa2Cu3O7-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/Hz1/2 at 10Hz, and increases to 3pT/Hz1/2 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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