High-field vortex dynamics in YBa2Cu3O7 from 17O nuclear magnetic resonance

H. N. Bachman, A. P. Reyes, V. F. Mitrovic, William P Halperin, A. Kleinhammes, P. Kuhns, W. G. Moulton

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The magnetic field-temperature phase diagram for vortex dynamics in YBa2Cu3O7 has been extended up to 24 T based on 17O NMR experiments on aligned powders. Both spectrum analysis and spin-spin relaxation experiments indicate that vortices are pinned below a temperature Tp, which for low fields is consistent with Tm, the first order melting transition for clean, untwinned crystals. At high fields 10-24T, Tp is 80 K and field independent. Pinned vortices have a Lorentzian spectral density of field fluctuations with a sharp onset.

Original languageEnglish (US)
Pages (from-to)1726-1729
Number of pages4
JournalPhysical Review Letters
Volume80
Issue number8
DOIs
StatePublished - Feb 23 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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