Precursor superconducting diamagnetism in YBa2Cu3O7−δ with in-plane or intercalated magnetic impurities

The magnetization around the superconducting transition was measured in YBa2Cu3O7−δ with magnetic impurities in the CuO2 layers (Cu substituted by Zn or Ni) or between them (Y substituted by Gd or Pr). While some of these impurities have an important effect on the superconducting transition temperat...

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Bibliographic Details
Published in:Superconductor science & technology 2013-04, Vol.26 (4)
Main Authors: Soto, F, Cotón, N, Dancausa, J D, Doval, J M, Ramos-Álvarez, A, Rey, R I, Rodríguez, L, Carballeira, C, Mosqueira, J, Ramallo, M V, Vidal, F
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Diamagnetism, paramagnetism and superparamagnetism
Exact sciences and technology
Magnetic properties and materials
Physics
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Summary:The magnetization around the superconducting transition was measured in YBa2Cu3O7−δ with magnetic impurities in the CuO2 layers (Cu substituted by Zn or Ni) or between them (Y substituted by Gd or Pr). While some of these impurities have an important effect on the superconducting transition temperature (Tc), the precursor diamagnetism observed above Tc is not appreciably affected. This result contrasts with recent observations in a conventional BCS superconductor (La), in which the precursor diamagnetism was found to increase several orders of magnitude with the addition of a small amount (a few atomic per cent) of Gd or Pr magnetic impurities.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/26/4/045007