Open AccessExperimental study of the lower critical field in high-{Tc}-single crystals
Author(s) -
C Brandstatter,
C Boehmer,
H W Weber,
B. W. Veal
Publication year - 1997
Language(s) - English
Resource type - Reports
DOI - 10.2172/510427
Subject(s) - superconductivity , squid , magnetometer , condensed matter physics , field (mathematics) , penetration depth , materials science , critical field , analytical chemistry (journal) , magnetic field , chemistry , physics , optics , mathematics , quantum mechanics , chromatography , ecology , pure mathematics , biology
Employing SQUID magnetometry and novel measuring and evaluation techniques, precise information on the first penetration field can be obtained and used to extract H{sub cl}. Tl- and Bi-based as well as a series of oxygen deficient Y-123 high {Tc} superconducting single crystals were investigated (H{parallel}c). In all cases, H{sub cl} is smaller than previously reported and can be described by BCS-theory