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Evidence for vortex lattice melting and softening in untwinned YBa2Cu3O7 single crystal

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Abstract

Real part of the ac susceptibility X′1 of an untwinned YBa2 Cu3O7 single crystal jumps at the onset temperature in the narrow width (0.1 K in 0.7 T), suggesting the first-order melting transition. A sharp X′1 dip and a sharp X″ peak can be interpreted as synchronous trapping of vortices due to lattice softening prior to melting. At lower temperatures, the X′1-X″1 chart shows a single-parameter behavior while the melting occurs as a strong deviation from this.

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Authors and Affiliations

  1. Department of Physics and Electronics, Osaka Prefecture University, 1-1, Gakuen-cho, Sakai, 593, Osaka, Japan

    Takekazu Ishida, Kiichi Okuda, Hidehito Asaoka & Yukio Kazumata

  2. JAERI, Tokai-mura, Naka-gun, 319-11, Ibaraki, Japan

    Kenji Noda

  3. Faculty of Science, Osaka University, Toyonaka, 560, Osaka, Japan

    Humihiko Takei

Authors
  1. Takekazu Ishida
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  2. Kiichi Okuda
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  3. Hidehito Asaoka
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  4. Yukio Kazumata
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  5. Kenji Noda
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  6. Humihiko Takei
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Ishida, T., Okuda, K., Asaoka, H. et al. Evidence for vortex lattice melting and softening in untwinned YBa2Cu3O7 single crystal. J Low Temp Phys 105, 1171–1176 (1996). https://doi.org/10.1007/BF00753858

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  • DOI: https://doi.org/10.1007/BF00753858

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