Magnetic field dependent direct rf power absorption studies in Bi_2 Sr_2 CaCu_2 O_8 single crystals

TL;DR

This study investigates how magnetic fields influence rf power absorption in Bi_2Sr_2CaCu_2O_8 superconducting crystals, revealing unexpected dissipation behavior below Tc linked to Josephson junction decoupling.

Contribution

Introduces a novel measurement technique for rf power dissipation and explains the observed dissipation peaks in terms of Josephson junction energy.

Findings

Observed larger than normal state dissipation below Tc

Detected magnetic field dependent peaks in rf absorption

Attributed dissipation behavior to Josephson junction decoupling

Abstract

Using a novel technique of measuring direct rf power dissipation, the temperature and magnetic field dependence of rf absorption in superconducting single crystals of Bi_2Sr_2CaCu_2O_8 is studied. An unexpected, larger than normal state, dissipation is observed below Tc, which exhibits peaks at magnetic field dependent temperatures. An explanation is provided for this observation in terms of the energy required to decouple the intrinsic Josephson junctions in the crystals.