Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Angular distributions of the critical current of ReBCO coated conductors in magnetic field up to 5T

  • Mineev, Nikolay A. (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute, International Laboratory of High Magnetic Fields and Low Temperatures) ;
  • Rudnev, Igor A. (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute, International Laboratory of High Magnetic Fields and Low Temperatures)
  • Received : 2015.01.20
  • Accepted : 2015.03.20
  • Published : 2015.03.31
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Abstract

For many applications of $ReBa_2Cu_3O_{7-x}$ (ReBCO) tapes it is needed to know the anisotropic properties of the used conductor in a broad range of magnetic field. In this paper we present the results of transport measurements on the SuNAM tape (GdBaCuO) with the rotation of the sample in magnetic fields up to 5 T in liquid nitrogen. The critical current over the magnetic field orientation ($I_c({\theta})$) curves demonstrate the appearance of distinct second peak around c-axis in low fields. This peak almost vanishes in the fields over 3 T. The evolution of the ab-peak form is also presented: the peak consistently reduces its height with the magnetic field going up and in the high fields the shoulders rise, changing the type of the distribution. To describe experimental curves the vortex path model was applied to the angular distributions of the critical current in magnetic field. Good agreements of the experimental data with the analytical expressions were obtained that confirm the vortex path model approach.

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References

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