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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/16557

Title: Stepwise amorphization of the flux-line lattice in Ca3Rh4Sn13: A peak-effect study
Authors: SARKAR, S
PAL, D
BANERJEE, SS
RAMAKRISHNAN, S
GROVER, AK
TOMY, CV
RAVIKUMAR, G
MISHRA, PK
SAHNI, VC
BALAKRISHNAN, G
PAUL, DM
BHATTACHARYA, S
Keywords: phase superconductor ceru2
first-order transition
single-crystals
mixed-state
magnetization measurements
topological defects
ii superconductors
vortex lattice
elastic theory
2h-nbse2
Issue Date: 2000
Publisher: AMERICAN PHYSICAL SOC
Citation: PHYSICAL REVIEW B, 61(18), 12394-12403
Abstract: The peak effect (PE) region in a single crystal of Ca3Rh4Sn13 is shown to comprise two discontinuous first-order-like transitions located near its onset and peak positions, in accordance with a stepwise fracturing of the flux-line lattice. Magnetization response to thermal cycling across the onset position produces an open hysteresis loop, consistent with the notion of the fracturing. A thermomagnetic history dependence study shows that the critical current density J(c)(H,T) is path dependent over a large part of the (H,T) parameter space. Tills path dependence ceases above the peak position of the peak effect, suggesting a complete amorphization of the flux-line lattice at (T-p,H-p) line. A plausible vortex phase diagram has been constructed for Ca3Rh4Sn13 in which phases like an elastic solid, a plastic solid, and pinned and unpinned amorphous states have been identified.
URI: http://dx.doi.org/10.1103/PhysRevB.61.12394
http://dspace.library.iitb.ac.in/xmlui/handle/10054/16557
http://hdl.handle.net/10054/16557
ISSN: 1098-0121
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