Vortex shear modulus and lattice melting in twin boundary channels of YBa{sub {bold 2}}Cu{sub {bold 3}}O{sub {bold 7{minus}}}{ital {delta}}
- Materials Science Division and Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Melting of the vortex lattice is probed directly by investigating the flow of vortices in channels created by twin boundaries. The angular-dependent resistivity {rho}{sub {ital T},{ital H}}({theta}) has a maximum above the melting temperature {ital T}{sub {ital m}} and crosses over to a minimum below, corresponding to the onset of a shear modulus which reduces vortex flow in the channels. A peak effect in the critical current below {ital T}{sub {ital m}} is accompanied by a sharp increase in the twin boundary pinning accommodation angle. We calculate the effective twin boundary pinning energy by relating the accommodation angle to a thermal depinning angle. {copyright} {ital 1996 The American Physical Society.}
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 285771
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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