Angular dependence of direct rf power absorption studies in Bi2Sr2CaCu2O8 single crystals

TL;DR

This study investigates how the orientation of magnetic fields affects rf power absorption in Bi2Sr2CaCu2O8 single crystals, revealing peaks linked to Josephson junctions and vortex motion, advancing understanding of anisotropic superconducting properties.

Contribution

It introduces a novel measurement technique for direct rf power absorption and elucidates the angular dependence of absorption peaks related to Josephson junctions and vortex dynamics.

Findings

Two absorption peaks observed with temperature.

Peak amplitudes vary with orientation.

Vortex motion peak appears below Tc.

Abstract

We have studied rf power dissipation in Bi2Sr2CaCu2O8 single crystals as a function of angle between the applied field and c-axis of the crystal by using a novel technique of measuring direct rf power absorption. We observed two peaks in power absorption as a function of temperature. The amplitude and position of the first peak (peak A) change with orientation and attributed to Josephson junctions decoupling. The second peak (peak B) appears just below Tc has been attributed to the vortex motion and its amplitude depends on the angle of orientation.