Thermomagnetic flux-jump instabilities and second magnetization peak in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} high-{Tc} superconducting crystals

Journal Article · Sun Aug 01 04:00:00 EDT 1999 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1023/A:1021893818924· OSTI ID:687509

Kopelevich, Y; Moehlecke, S; Torres, J H.S.; Silva, R.R. da ^[1]; Esquinazi, P ^[2]

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1. Univ. Estadual de Campinas, Sao Paulo (Brazil). Inst. de Fisica Gleb Wataghin
2. Univ. Leipzig (Germany). Dept. of Superconductivity and Magnetism

Measurements of the magnetization hysteresis loop performed on Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} high-{Tc} superconducting single crystals reveal the occurrence of pronounced jumps of the irreversible magnetization at T > 40 K. In this work the authors 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.

• OSTI ID: 687509
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 116; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL FIELD
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MAGNETIZATION
STRONTIUM OXIDES