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EFFECT OF SILVER ADDITION ON THE SUPERCONDUCTING PROPERTIES OF LaBa2Cu3O7-δδδδ CERAMICS

E. Nazarova1,* , K. Nenkov2,3, A. Angelow1, A. Zahariev1

Affiliation

  1. Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
  2. IFW, Institute of Solid State and Materials Research, P.O. BOX 270016, D-01171 Dresden, Germany
  3. International Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-529 Wroclaw, Poland

Abstract

The behavior of the AC magnetic susceptibility, as a function of temperature and the external magnetic field, has been investigated for sintered LaBa2Cu3O7- (La123) and La123 + 20wt% Ag specimens. It has been observed that the screening capabilities are smaller for the Ag-doped sample, and that the irreversibility line is degraded as well. The constant temperature magnetic susceptibility decreases with visible oscillations in both types of sample, due to Josephson junction effects. These observations have been explained by different order parameter suppression at the superconductor-insulator (S-I) and superconductor-normal metal (S-N) interfaces..

Keywords

Sintered La123, Ag additions, Magnetic properties, Quantum oscillations.

Submitted at: Dec. 9, 2004
Accepted at: Jan. 26, 2005

Citation

E. Nazarova, K. Nenkov, A. Angelow, A. Zahariev, EFFECT OF SILVER ADDITION ON THE SUPERCONDUCTING PROPERTIES OF LaBa2Cu3O7-δδδδ CERAMICS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 427-430 (2005)