Pinning-free behaviour of the Flux Line Lattice in fully-oxygenated YBCO7
We have previously made observations of the very high-field, high-temperature behaviour of flux lines in an YBCO sample, obtaining results that were nearly ideal. However, the results from this previous sample were affected by pinning from a low concentration of oxygen vacancies. We are subjecting our high-purity crystals to a prolonged high-pressure oxygen anneal, to bring them fully to the O7 concentration, in order to obtain intrinsic results for the flux line lattice structure approaching the melting transition, and the temperature- and field-dependence of the flux lattice distortion and the superfluid density.
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FORGAN Edward M.; BLACKBURN Elizabeth; CAMERON Alistair; CUBITT Robert; DEWHURST Charles; Alexander T Holmes; LEMBERGER Louis; LIM Joshua; LOEW Toshinao and WHITE Jonathan. (2012). Pinning-free behaviour of the Flux Line Lattice in fully-oxygenated YBCO7. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-343
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