Characteristics of a highly sensitive magnetic sensor constructed of a thick HTS film
| Autor: | Takumi Minemoto, K. Mori, Mineo Itoh, M. Ishidoh |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
High-temperature superconductivity
Materials science Fabrication Superconducting thin films Analytical chemistry Champ magnetique Liquid nitrogen Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Highly sensitive Magnetic field Hysteresis Nuclear magnetic resonance law Electrical and Electronic Engineering |
| Zdroj: | IEEE Transactions on Appiled Superconductivity. 9:3085-3088 |
| ISSN: | 1051-8223 |
| DOI: | 10.1109/77.783681 |
| Popis: | For use in constructing highly sensitive magnetic sensors, the present authors have been studying the preparation of thick Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO) films. In this research, thick YBCO film was fabricated as the magnetic sensor, constructed to retain a residual resistance R/sub res/ at the boiling point of liquid nitrogen (77.4 K). The resistance R/sub ms/ of the magnetic sensor, in the transition region /spl Delta/T, is found to be highly sensitive to the applied magnetic field B/sub ex/, where /spl Delta/T is the region of temperatures between the resistance drop T/sub c//sup onset/ and residual resistance T/sub c//sup res/ temperatures. Under temperature conditions of 77.4 K, the value of R/sub ms/ for this sensor (1.5 mm in width, 67 mm in length, and 280 /spl mu/m thick) for an applied B/sub ex/ of 80/spl times/10/sup -4/ T, increased by factor of 5.8 times greater than that in the absence of a magnetic held. In addition, no evidence was found of the existence of hysteresis in the R/sub ms/ vs B/sub ex/ characteristics for weak values of B/sub ex/. The present paper examines the fabrication conditions and magnetic responses of the highly sensitive sensor constructed of a thick YBCO film. |
| Databáze: | OpenAIRE |
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