Volume 33, Number 2, January II 1996
|Page(s)||153 - 158|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Linear temperature variation of the penetration depth in YBa2Cu3O7-δ thin films
Laboratoire de Physique de la Matière Condensée, Ecole Normale
24 rue Lhomond - 75231 Paris Cedex 05, France
2 Laboratoire de Physique Statistique, Ecole Normale Supérieure 24 rue Lhomond - 75231 Paris Cedex 05, France
3 Laboratoire Central de Recherches, Thomson-CSF - Domaine de Corbeville 91404 Orsay Cedex, France
Accepted: 28 November 1995
We have measured the penetration depth on thin films from transmission at 120, 330 and 510 GHz, between 5 and 50 K. Our data yield simultaneously the absolute value and the temperature dependence of . In high-quality films exhibits the same linear temperature dependence as single crystals, showing its intrinsic nature, and Å. In a lower quality one, the more usual T2-dependence is found, and Å. This suggests that the T2 variations is of extrinsic origin. Our results put the wave–like interpretation in a much better position.
PACS: 74.25.Nf – Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.) / 74.72.Bk – Y-based compounds / 74.76.Bz – High-Tc cuprate films
© EDP Sciences, 1996
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