NMR and Vortex Lattice Melting in YBa{sub 2}Cu{sub 3}O{sub 7}
- Department of Physics, The Ohio State University, 174 W. 18th Ave, Columbus, Ohio 43210 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
We report {sup 89}Y and {sup 17}O NMR (9T) echo decays for YBa{sub 2}Cu{sub 3}O{sub 7} and correct for contributions from dipolar coupling {sup 63,65}Cu in order to isolate effects of vortex dynamics. We confirm vortex localization in the solid state with rms displacements consistent with Langevin dynamical theory, but with motional dynamics at time scales (10{endash}100{mu}s) some {approximately}10{sup 6} times slower than predicted. Vortex migration over longer time scales is restricted to distances less than 1/100 of an intervortex spacing over times as long as 100ms, in contrast with the rapid long range diffusion occurring in the liquid state. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Purdue Research Foundation
- DOE Contract Number:
- FG02-90ER45427
- OSTI ID:
- 496814
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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