Ehrenfest order of transitions in Bi-based superconductors
โ Scribed by P. Kumar
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 171 KB
- Volume
- 199-200
- Category
- Article
- ISSN
- 0921-4526
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๐ SIMILAR VOLUMES
Bi-Sr-Ca-Cu-O mierostriplines having both a superconducting line and groundplane were fabricated on a MgO substrate by rf magnetron sputtering. The samples were 26.4 mm long and were nearly single-phase high-To materials. Their microwave properties have been investigated at frequencies up to 20 GHz
The time decay of the magnetization was studied on Tl -Ba -Ca -Cu -0 and Bi ( Pb ) -Sr -Ca -Cu -0 superconductors. In the Tl -based compound, the results provide evidence for a non thermally activated flux motion at low temperature suggesting quantum tunneling of vortices. In the Bi-based compound a