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Kinetic Energy Density Induced by High Magnetic Fields in a Bi-2212 Single Crystal

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Abstract

We have measured isofield curves for the kinetic energy density (E k) in the superconducting state of a Bi2Sr2CaCu2O8+δ (Bi-2212) single crystal. These curves were determined from magnetization versus temperature experiments that were analyzed according to the prescription of the virial theorem of superconductivity. The magnetization measurements were carried out using the zero field cooling (ZFC) and field cooled cooling (FCC) protocols. This procedure allows the determination of the temperature interval where the magnetization behaves reversibly. This study is limited to the temperature region where the pinning effects are negligible. The field-induced kinetic energy is associated with the currents circulating around the vortices. The obtained results allow the estimation of the upper critical field and are in accordance to the expectations of the Abrikosov theory for type-II superconductors.

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Acknowledgments

We are thankful to Jully Paola Peña for enlightening discussions on the field-induced kinetic energy in high- T c superconductors. This work was partially financed by the Brazilian agencies FAPERGS and CNPq under the grand Pronex 10/0009-2.

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Authors and Affiliations

  1. Instituto de Física, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, C.P. 15051, Porto Alegre, RS, 91501-970, Brazil

    Moisés Leonardi de Almeida & Paulo Pureur

  2. Departamento de Física, Universidade Federal de Pelotas, P.O.Box 354, Campus Universitário s/n°, Pelotas, RS, 96010-900, Brazil

    Fábio Teixeira Dias & Valdemar das Neves Vieira

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  1. Moisés Leonardi de Almeida
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  2. Paulo Pureur
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  3. Fábio Teixeira Dias
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  4. Valdemar das Neves Vieira
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Correspondence to Moisés Leonardi de Almeida.

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de Almeida, M.L., Pureur, P., Teixeira Dias, F. et al. Kinetic Energy Density Induced by High Magnetic Fields in a Bi-2212 Single Crystal. J Supercond Nov Magn 28, 411–414 (2015). https://doi.org/10.1007/s10948-014-2755-1

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  • DOI: https://doi.org/10.1007/s10948-014-2755-1

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