Flux motion in Bi and Tl โ based superco
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D. Fiorani; A.M. Testa; J. Tejada
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Article
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1993
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Elsevier Science
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English
โ 814 KB
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