We present measurements of the microwave complex resistivity at 48 GHz in REBa2Cu3O7-δ thin films (RE = Y, Sm) in moderate magnetic fields (μ0H < 0.8 T) and above 60 K. The measured complex resistivity gives valuable information for the study of vortex dynamics. We show that the field dependence of the microwave resistivity has rather different behaviours in YBa2Cu3O 7-δ and SmBa2Cu3O7-δ. By applying the conventional model of vortex motion, the data in SmBa 2Cu3O7-δ would yield exotic behaviours for the vortex parameters. However, taking into account the enhanced field-induced change in quasiparticle density in a superconductor with lines of nodes in the gap, the vortex part of the response behaves similarly in YBa 2Cu3O7-δ and SmBa2Cu 3O7-δ. © 2004 Elsevier B.V. All rights reserved.
Mixed-state microwave resistivity in RE–BaCuO films / E., Silva; R., Marcon; L., Muzzi; N., Pompeo; Fastampa, Renato; Giura, Maurizio; Sarti, Stefano; M., Boffa; A. M., Cucolo; M. C., Cucolo. - In: PHYSICA. C, SUPERCONDUCTIVITY. - ISSN 0921-4534. - STAMPA. - 404:(2004), pp. 350-353. [10.1016/j.physc.2003.11.031]
Mixed-state microwave resistivity in RE–BaCuO films
FASTAMPA, Renato;GIURA, Maurizio;SARTI, Stefano;
2004
Abstract
We present measurements of the microwave complex resistivity at 48 GHz in REBa2Cu3O7-δ thin films (RE = Y, Sm) in moderate magnetic fields (μ0H < 0.8 T) and above 60 K. The measured complex resistivity gives valuable information for the study of vortex dynamics. We show that the field dependence of the microwave resistivity has rather different behaviours in YBa2Cu3O 7-δ and SmBa2Cu3O7-δ. By applying the conventional model of vortex motion, the data in SmBa 2Cu3O7-δ would yield exotic behaviours for the vortex parameters. However, taking into account the enhanced field-induced change in quasiparticle density in a superconductor with lines of nodes in the gap, the vortex part of the response behaves similarly in YBa 2Cu3O7-δ and SmBa2Cu 3O7-δ. © 2004 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
