Title:
SUPERCONDUCTING DEVICE
Document Type and Number:
Japanese Patent JP3275836
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To stabilize the operation against temperature change and enable a superconducting device to operate at a high temperature of a liquid nitrogen temperature or higher, by providing the c axis of the crystal of an oxide superconductor that constitutes the superconducting device to be substantially vertical to the direction of a superconducting electromagnetic wave that flows in the oxide superconductor.
SOLUTION: On a substrate 11 formed of single crystal SrTiO3, a superconductor having a composition of (La0.9Sr0.1)2CuO4 is deposited for a prescribed thickness by sputtering so as to permit the c axis of the crystal to be vertical to the substrate 11. A weakly coupling part 9 having a prescribed thickness is formed by performing Ar ion etching on a part of a heated superconductor, which is heated in a prescribed oxygen atmosphere, and a photoconductive semiconductor 8 composed of CdS is formed on the weakly coupling part 9. The value of a current that flows in the X axis direction of the semiconductor 8 can be easily controlled by projecting a fine intensity light, and the semiconductor operates as a highly sensitive and high speed photo detecting device. Thus, the superconducting device having the superconducting weakly coupled part that operates at a low temperature is provided without deteriorating the superconducting characteristics of the Ba-Y-Cu oxide.
Inventors:
Juichi Nishino
riverside tide
Yoshinobu Tarutani
Toshiyuki Aida
Tokumi Fukasawa
Shinya Kominami
Mutsuko Hatano
riverside tide
Yoshinobu Tarutani
Toshiyuki Aida
Tokumi Fukasawa
Shinya Kominami
Mutsuko Hatano
Application Number:
JP17432698A
Publication Date:
April 22, 2002
Filing Date:
June 22, 1998
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H01L39/22; C01G1/00; C01G3/00; C23C14/08; C30B29/22; H01B12/00; H01L39/24; (IPC1-7): H01L39/22; H01B12/00
Domestic Patent References:
| JP63306677A |
Other References:
【文献】「電波新聞」,日本,1987年 5月19日,第1面
【文献】北沢宏一・岸尾光二・長谷川哲也・笛木和雄,[高臨界温度酸化物超伝導体(La1-xSrx)2CuO4とその周辺],「応用物理」,日本,1987年 5月10日,第56巻,第5号,pp.605(33)-pp.614(42)
【文献】北沢宏一・岸尾光二・長谷川哲也・笛木和雄,[高臨界温度酸化物超伝導体(La1-xSrx)2CuO4とその周辺],「応用物理」,日本,1987年 5月10日,第56巻,第5号,pp.605(33)-pp.614(42)
Attorney, Agent or Firm:
Yasuo Sakuta