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|Type:||Artigo de periódico|
|Title:||Thermomagnetic Flux-jump Instabilities And Second Magnetization Peak In Bi2sr2cacu2o8 High-tc Superconducting Crystals|
Da Silva R.R.
|Abstract:||Measurements of the magnetization hysteresis loop performed on Bi2Sr2CaCu2O8 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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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