Abstract
Measurements of the magnetization hysteresis loop performed on Bi 2 Sr 2 CaCu 2 O 8 high-Tc superconducting single crystals reveal the occurrence of pronounced jumps of the irreversible magnetization at T > 40 K. In this work we demonstrate their thermomagnetic origin. It is also shown that the low-field hollow in the magnetization hysteresis loops measured at T < 40 K and leading to the so-called “second magnetization peak,” is the manifestation of a thermomagnetic instability effect. It is suggested that the plastic vortex motion triggers the magnetic instabilities.
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Kopelevich, Y., Moehlecke, S., Torres, J.H.S. et al. Thermomagnetic Flux-Jump Instabilities and Second Magnetization Peak in Bi2Sr2CaCu2O8 High-T c Superconducting Crystals. Journal of Low Temperature Physics 116, 261–276 (1999). https://doi.org/10.1023/A:1021893818924
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DOI: https://doi.org/10.1023/A:1021893818924