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Re-entrant peak effect in an anisotropic superconductor 2H-NbSe2: Role of disorder

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UNSPECIFIED (1998) Re-entrant peak effect in an anisotropic superconductor 2H-NbSe2: Role of disorder. EUROPHYSICS LETTERS, 44 (1). pp. 91-97.

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Abstract

The influence of disorder (induced by pinning centres) on the peak effect (PE) phenomenon, namely, an anomalous increase in J(c) vs. H (or T), has been studied in the anisotropic superconductor 2H-NbSe2. Results from new electrical transport as well as de and ac magnetic response studies are presented to demonstrate that increasing disorder shrinks the (H, T) parameter space over which the vortex lattice retains spatial order. We find that the re-entrant nature of PE is clearly manifested only in crystals which have moderate amount of disorder. We also find that the upper branch of the PE curve is fairly robust, whereas the lower re-entrant branch is strongly affected by disorder.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Journal or Publication Title: EUROPHYSICS LETTERS
Publisher: E D P SCIENCES
ISSN: 0295-5075
Official Date: 1 October 1998
Dates:
DateEvent
1 October 1998UNSPECIFIED
Volume: 44
Number: 1
Number of Pages: 7
Page Range: pp. 91-97
Publication Status: Published

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