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Heat capacity of GdBaSr(Cu3−x M x)O7−δ superconductor (M=Zn and Ni)

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Abstract

In this study, GdBaSr(Cu3−x M x)O7−δ bulk samples (M=Zn and Ni; 0≤x≤0.1) were prepared via solid-state reaction. Specific heat measurement (measured with thermal relaxation technique using PPMS) shows an obvious specific heat jump around the T c for GdBaSrCu3O7−δ sample as observed in most of the high temperature superconductors. It shifts towards lower temperature with increasing of both Zn and Ni doping contents, whose tendency is similar to the decreasing of T c. Debye temperature, ΘD (derived from specific heat measurements) calculated at around 10 K is found to be directly proportional to the T c.

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Authors and Affiliations

  1. Graduate School of Science and Engineering, Human Sensing Program, Yamagata University, 4-3-16 Johnan, Yonezawa City Yamagata, 992-8510, Japan

    T. V. Chong, S. Kambe & O. Ishii

  2. Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan

    H. Kawaji & T. Atake

Authors
  1. T. V. Chong
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  2. S. Kambe
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  3. H. Kawaji
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  4. T. Atake
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  5. O. Ishii
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Correspondence to S. Kambe.

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Chong, T.V., Kambe, S., Kawaji, H. et al. Heat capacity of GdBaSr(Cu3−x M x)O7−δ superconductor (M=Zn and Ni). J Therm Anal Calorim 92, 425–429 (2008). https://doi.org/10.1007/s10973-007-8964-0

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  • DOI: https://doi.org/10.1007/s10973-007-8964-0

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