Abstract
The field-modulated microwave (MW) absorption in non- and hydrogenated La 1.85Sr 0.15CuO 4 high-temperature superconductors was measured. The relationship between the microwave hysteresis at high magnetic field ( H = 3 kG) and the irreversible magnetization has been investigated. It has been established that the temperature dependence of the MW hysteresis is not in a line with magnetic hysteresis data. The value of the pinning energy of 50 meV at 15 K in magnetic field of 3.0 kG for the non- and hydrogenated samples has been estimated.
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