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Two-stage crossover...
Two-stage crossover from thermal to quantum flux creep of dilute vortex ensembles in various high-T-c superconducting thin films
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Akerman, J. J. (författare)
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Venturini, E. L. (författare)
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Siegal, M. P. (författare)
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Yun, S. H. (författare)
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Karlsson, U. O. (författare)
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- Rao, K. V. (författare)
- KTH,Materialvetenskap
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(creator_code:org_t)
- 2001
- 2001
- Engelska.
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Ingår i: Physical Review B Condensed Matter. - 0163-1829 .- 1095-3795. ; 64:9
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The thermal-to-quantum flux creep crossover at low vortex densities has been studied in YBa2Cu3O7, TlBa2CaCu2O7-delta, and HgBa2CaCu2O6+delta thin films using ac susceptibility. The crossover temperatures T-cr are 10-11, 17, and 30 K, respectively. Both thermal and quantum flux creep is suppressed as the vortex density is decreased. We observe a two-stage nature in the crossover behavior which appears to be a general property of all the three materials studied.
Nyckelord
- high-temperature superconductors
- magnetic-relaxation
- single-crystal
- ii superconductors
- ac susceptibility
- bulk superconductors
- collective
- creep
- columnar defects
- current-density
- vortices
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- art (ämneskategori)
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