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Superconducting Fluctuation Effects on the Electron Spin Susceptibility in YBa2Cu3O6.95

H. N. Bachman, V. F. Mitrovi{ć}, A. P. Reyes, W. P. Halperin, M. Eschrig, J. A. Sauls, A. Kleinhammes, P. Kuhns, W. G. Moulton

cond-mat.supr-conarXiv:cond-mat/9901231

Abstract

The electronic spin susceptibility of YBa2Cu3O6.95 has been measured with high precision up to 24 Tesla with 17O nuclear magnetic resonance. Its temperature dependence can be accounted for by superconducting fluctuations that result in a smooth crossover from the normal to the vortex liquid state. A magnetic field-temperature phase diagram for this crossover has been established having strong upward curvature.

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