Reduction in energy dissipation rate with increased effective applied field

0449090 - FZÚ 2016 RIV GB eng J - Journal Article
Janů, Zdeněk - Soukup, František
Reduction in energy dissipation rate with increased effective applied field.
Superconductor Science and Technology. Roč. 28, č. 8 (2015), "085016-1"-"085016-5". ISSN 0953-2048. E-ISSN 1361-6668
Institutional support: RVO:68378271
Keywords : critical state * hysteresis * energy dissipation rate * field waveform
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.717, year: 2015

Dynamics of a response of type-II superconductors to a time-varying magnetic field can exhibit rate-independent or rate-dependent hysteresis. An energy dissipation rate in a superconductor placed in a time varying magnetic field depends on its waveform and type of hysteresis which depends on temperature. The same waveform may reduce the energy dissipation rate in the case of true hysteresis while may increase the energy dissipation rate in the case of dynamic hysteresis compared with an energy dissipation rate in a pure sinusoidal field. We present experimental data which confirm the energy dissipation rate calculated using the critical state theory for the case of rate-independent hysteresis and limiting behavior in normal state for the case of rate-dependent hysteresis.
Permanent Link: http://hdl.handle.net/11104/0250676