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Onset of superconductivity at 107K in YBa2Cu3O7 − δ at high pressure

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Abstract

Electrical resistivityρ measurements under pressure have been carried out on the high-temperature superconductor YBa2Cu3O7 − δ as a function of temperature T between 1 and 300 K at various pressures between 8 kbar and 149 kbar. The superconducting transition temperature Tc increases almost linearly with pressure at the rate dTc/dP ∼- 0.13 K/kbar. The onset of Tc, defined as the temperature at whichρ(T) drops to 90% of its extrapolated normal state value, increases from ∼95 K at 8 kbar to 107 K at 149 kbar. These results suggest that higher pressures will yield yet higher values of Tc.

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Authors and Affiliations

  1. Deptartment of Physics and Institute for Pure and Applied Physical Sciences, University of California, 92093, San Diego, La Jolla, CA, USA

    M. W. McElfresh, M. B. Maple & K. N. Yang

  2. Physics Division, Los Alamos National Laboratory, 87545, Los Alamos, NM, USA

    Z. Fisk

  3. Physics Division, Los Alamos National Laboratory, 87545, Los Alamos, NM, USA

    M. W. McElfresh

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  1. M. W. McElfresh
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  2. M. B. Maple
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  3. K. N. Yang
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  4. Z. Fisk
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McElfresh, M.W., Maple, M.B., Yang, K.N. et al. Onset of superconductivity at 107K in YBa2Cu3O7 − δ at high pressure. Appl. Phys. A 45, 365–368 (1988). https://doi.org/10.1007/BF00617944

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