Fabrication of a magnetic field-polarity sensor using the electromagnetic properties of a YBCO superconductor

被引：0
|
作者：
Lee, SH [1 ]
机构：
[1] Sun Moon Univ, Dept Elect Informat Commun Engn, Chungnam 336840, South Korea
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2002年 / 15卷 / 03期
关键词：
D O I：
10.1088/0953-2048/15/3/326
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The relationship between the electrical properties of a YBaCuO superconductor and an externally applied magnetic field was studied to develop a magnetic field-polarity sensor. The electrical resistance of the superconductor was increased by applying external magnetic field even after the removal of the magnetic field. The behaviour shown was related to the magnetic flux trapped in the superconductor, which penetrates through the material by the external magnetic field. Some portion of the superconductor was changed to a normal state by the trapped magnetic flux. The appearance of the normal state yielded to enhance the electrical resistance. Electrical characteristics of the superconductor with trapped magnetic flux were extremely sensitive to the external magnetic field and showed different responses depending on the direction of the magnetic field. Considering the observed properties of the superconductor with trapped magnetic flux, a magnetic sensor was fabricated to simultaneously detect both the intensity and the direction of the magnetic field. The sensitivity of the sensor was less than 10(-4) T.
引用
收藏
页码：421 / 422
页数：2
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