Resistive Losses in Single-Crystal Ba0.6K0.4Fe2As2
Abstract
Recently, we conducted surface resistance measurements using electron spin resonance techniques on single-crystal Ba0.6K0.4Fe2As2 samples (rf frequency = 20.3 GHz), testing temperature and field dependence. In the superconducting state, the samples exhibit dissipative losses which increase monotonically as a function of applied field for fixed temperature. The level of field-dependent dissipation increases as T approaches TC from below, and vanishes at the transition. The dissipation is also dependent on the angle between the rf field and the static field, consistent with flux-flow models of other high-temperature superconductors, such as YBCO.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2014
- Bibcode:
- 2014APS..MARG13005B