We present measurements of the magnetic field-induced microwave complex resistivity changes at 47 GHz in Tl2Ba2CaCu2O8+d (TBCCO) thin films, in the ranges 58 K < T < Tc and 0 < l0H < 0.8 T. The large imaginary part Dq2(H) points to strong elastic response, but the data are not easily reconciled with a rigid vortex model. We find that, over a wide range of temperatures, all the pairs of curves Dq1(H) and Dq2(H) can be collapsed on a pair of scaling curves Dq1[H/H*(T)], Dq 2[H/H*(T)], with the same scaling field H*(T). We argue that H *(T) is related to the loss of vortex rigidity due to a vortex transformation.
Pompeo, N., R., M., S., S., H., S., E., S. (2007). Scaling of the microwave magneto-impedance in Tl2Ba2CaCu2O8 thin films. PHYSICA. C, SUPERCONDUCTIVITY, 460-462, 825-826 [10.1016/j.physc.2007.04.164].
Scaling of the microwave magneto-impedance in Tl2Ba2CaCu2O8 thin films
POMPEO, NICOLA;
2007-01-01
Abstract
We present measurements of the magnetic field-induced microwave complex resistivity changes at 47 GHz in Tl2Ba2CaCu2O8+d (TBCCO) thin films, in the ranges 58 K < T < Tc and 0 < l0H < 0.8 T. The large imaginary part Dq2(H) points to strong elastic response, but the data are not easily reconciled with a rigid vortex model. We find that, over a wide range of temperatures, all the pairs of curves Dq1(H) and Dq2(H) can be collapsed on a pair of scaling curves Dq1[H/H*(T)], Dq 2[H/H*(T)], with the same scaling field H*(T). We argue that H *(T) is related to the loss of vortex rigidity due to a vortex transformation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
