Orientation, temperature, and frequency dependence of nonresonant microwave absorption in HTSC powders
- 15 April 1991
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 69 (8) , 4880-4882
- https://doi.org/10.1063/1.348211
Abstract
Hysteresis in the microwave-power absorption of HTSC powders was studied as a function of temperature (T), field-sweep amplitude (Hmax), and orientation between the dc field (Hdc) and the wave vector of the microwaves (k). It was found that (i) the sizable low-temperature hysteresis effects occur only if Hdc∥k, (ii) the temperature and frequency dependence of the hysteresis is strongly affected by Hmax, (iii) the high- and low-temperature virgin curves are quite different, and (iv) the minimum of the absorption signal increases with Hmax and T. The low-temperature hysteresis loops were found to be similar to loops obtained from nonlinear equations describing cusp catastrophes.This publication has 3 references indexed in Scilit:
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- Frequency dependence of magnetic hysteresis in the field-induced microwave absorption in high Tc superconductors at T ⪡ TcPhysics Letters A, 1989
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