The Role of Weak Links and Zn-Doping on Magnetic Parameters of High-T (c) Superconductors


Topal U., Coker E. G. , Alikma F., Kolemen U. , Uzun O.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, vol.27, no.1, pp.133-141, 2014 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 1
  • Publication Date: 2014
  • Doi Number: 10.1007/s10948-013-2280-7
  • Title of Journal : JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Page Numbers: pp.133-141
  • Keywords: Superconductors, Superconductivity, Magnetometer, Magnetic properties, VICKERS HARDNESS PROPERTIES, MECHANICAL-PROPERTIES, NONLINEAR ELECTRODYNAMICS, SENSING INDENTATION, HARMONIC-GENERATION, GRAIN-BOUNDARIES, SENSORS, YBA2CU3O7, MAGNETOMETER, SENSITIVITY

Abstract

The second harmonic signal, which is generated by co-application of AC and DC fields to polycrystalline type-II superconductors, were analyzed in terms of the weak links and the critical current density. With this aim the YBa2Cu3-x Zn (x) O7-y (x=0, 0.01, 0.02, 0.03, 0.05, and 0.1) samples were synthesized in order to adjust intergranular couplings and thus the strength of weak links. The mechanical and magnetic measurements are in good agreement on that Zn doping reduces strength of the links between grains; however, contrary to the common expectations, it has no direct contribution to the 2nd harmonic signal strength.