Scaling of the microwave magneto-impedance in Tl$_2$Ba$_2$CaCu$_2$O$_{8+δ}$ thin films

E. Silva; N. Pompeo; R. Marcon; S. Sarti; H. Schneidewind

doi:10.1016/j.physc.2007.04.164

paper

Scaling of the microwave magneto-impedance in Tl $_{2}$ Ba $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ thin films

arXiv:cond-mat/0610478 · doi:10.1016/j.physc.2007.04.164

Abstract

We present measurements of the magnetic field-induced microwave complex resistivity changes at 47 GHz in Tl $_{2}$ Ba $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ (TBCCO) thin films, in the ranges 58 K $< T < T_{c}$ and 0 $< μ_{0} H <$ 0.8 T. The large imaginary part $Δ ρ_{2} (H)$ 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 $Δ ρ_{1} (H)$ and $Δ ρ_{2} (H)$ can be collapsed on a pair of scaling curves $Δ ρ_{1} [H / H^{*} (T)]$ , $Δ ρ_{2} [H / H^{*} (T)]$ , 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.

Two printed pages, Proceedings of M2S (Dresden, 2006), to appear in Physica C

Scaling of the microwave magneto-impedance in Tl2​Ba2​CaCu2​O8+δ​ thin films

Abstract

Scaling of the microwave magneto-impedance in Tl $_{2}$ Ba $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ thin films