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Stepwise amorphization of the flux-line lattice in Ca3Rh4Sn13: A peak-effect study

DSpace at IIT Bombay

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Title Stepwise amorphization of the flux-line lattice in Ca3Rh4Sn13: A peak-effect study
 
Creator SARKAR, S
PAL, D
BANERJEE, SS
RAMAKRISHNAN, S
GROVER, AK
TOMY, CV
RAVIKUMAR, G
MISHRA, PK
SAHNI, VC
BALAKRISHNAN, G
PAUL, DM
BHATTACHARYA, S
 
Subject phase superconductor ceru2
first-order transition
single-crystals
mixed-state
magnetization measurements
topological defects
ii superconductors
vortex lattice
elastic theory
2h-nbse2
 
Description 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.
 
Publisher AMERICAN PHYSICAL SOC
 
Date 2011-11-07T15:19:59Z
2011-12-26T13:01:04Z
2011-12-27T05:43:35Z
2011-11-07T15:19:59Z
2011-12-26T13:01:04Z
2011-12-27T05:43:35Z
2000
 
Type Article
 
Identifier PHYSICAL REVIEW B, 61(18), 12394-12403
1098-0121
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
 
Language en