We report the far-infrared properties of superconducting ab plane-oriented YBa2Cu3O7-δ films in magnetic fields of up to 27 T. The applications of magnetic field (with H perpendicular to the ab plane and with unpolarized light) at low temperature produces no discernible field dependence. This observation differs from other previous far-infrared measurements in this temperature range. Only at fields and temperatures where the dc resistance is not zero - on account of dissipative flux motion - is a field-induced effect observed.
ASJC Scopus subject areas
- 化學 (全部)