Evidence for a depinning transition in the vortex quasilattice of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}
- Interdisciplinary Research Centre in Superconductivity, University of Cambridge, Cambridge CB3 OHE (United Kingdom)
Magnetization measurements have been performed on several crystals of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} as a function of both temperature and magnetic field. A pinning crossover for vortices is identified at fields above the arrowhead second peak transition but below the irreversibility line in agreement with recent Hall-array measurements. In addition, a small but clear feature is apparent in the derivative of the magnetic moment as a function of temperature at fields below that of the arrowhead at an almost field-independent temperature of about 32 K. These features define a pinning-related transition that crosses continuously from the disordered into the ordered vortex solid phase. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 544908
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 56, Issue 17; Other Information: PBD: Nov 1997
- Country of Publication:
- United States
- Language:
- English
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