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Paramagnetic Meissner effect and strong time dependence at high fields in melt-textured high-T C superconductors

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Abstract

In this work we report on systematic field-cooled magnetization experiments in melt-textured YBa2Cu3O7−δ samples containing Y211 precipitates. Magnetic fields up to 14 T were applied either parallel or perpendicular to the ab planes and a strong paramagnetic response related to the superconducting state was observed. This effect is known as paramagnetic Meissner effect (PME). The magnitude of the PME increases when the field is augmented. This effect shows a strong paramagnetic relaxation, such that the paramagnetic moment increases as a function of the time. The pinning by the Y211 particles plays a crucial role in the explanation of this effect and our results suggest that the pinning capacity can produce a strong flux compression into the sample, originating the PME and the strong time dependence.

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Authors and Affiliations

  1. Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), Duque de Caxias, 25250-020, Brazil

    Cristol de Paiva Gouvêa

  2. Departamento de Física, Universidade Federal de Pelotas, Pelotas, 96010-900, Brazil

    Fábio Teixeira Dias, Valdemar das Neves Vieira & Douglas Langie da Silva

  3. Instituto de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, 91501-970, Brazil

    Jacob Schaf

  4. Dresden High Magnetic Field Laboratory, Helmholtz-Zentrum Dresden-Rossendorf, 01314, Dresden, Germany

    Frederik Wolff-Fabris

  5. Université de Poitiers, Poitiers, 86962, France

    Joan Josep Roa Rovira

Authors
  1. Cristol de Paiva Gouvêa
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  2. Fábio Teixeira Dias
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  3. Valdemar das Neves Vieira
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  4. Douglas Langie da Silva
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  5. Jacob Schaf
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  6. Frederik Wolff-Fabris
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  7. Joan Josep Roa Rovira
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Correspondence to Cristol de Paiva Gouvêa.

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de Paiva Gouvêa, C., Dias, F.T., das Neves Vieira, V. et al. Paramagnetic Meissner effect and strong time dependence at high fields in melt-textured high-T C superconductors. Journal of the Korean Physical Society 62, 1414–1417 (2013). https://doi.org/10.3938/jkps.62.1414

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  • DOI: https://doi.org/10.3938/jkps.62.1414

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