Abstract
We have studied the contact characteristics of two resin-impregnated YBCO (a composite of YBa2Cu3Oy and Y 2BaCuO5) bulk superconductors in mechanical contact. A switching phenomenon could be observed at a threshold current or a transfer current value in the V-I curves of the YBCO contact. The transfer current exceeded the previous value of 13.5 A at 77 K in the contact when the sample surfaces were carefully polished. The present results suggest that a pair of YBCO blocks might be applicable to the mechanical persistent current switch for superconducting magnetic energy storage and other superconducting systems run in a persistent current mode.
| Original language | English |
|---|---|
| Pages (from-to) | 729-733 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity and its applications |
| Volume | 392-396 |
| Issue number | PART 1 |
| DOIs | |
| Publication status | Published - 2003 Oct 1 |
| Externally published | Yes |
| Event | Proceedings of the 15th International Symposium on Superconduc - Yokohama, Japan Duration: 2002 Nov 11 → 2002 Nov 13 |
Keywords
- Contact resistance
- Persistent current switch
- Transfer current
- YBCO
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
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Cite this
Yamamoto, N., Sakai, T., Sawa, K., Tomita, M., & Murakami, M. (2003). Contact characteristics for YBCO bulk superconductors. Physica C: Superconductivity and its applications, 392-396(PART 1), 729-733. https://doi.org/10.1016/S0921-4534(03)01012-8