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Dual role of an ac driving force and the underlying two distinct order-disorder transitions in the vortex phase diagram of Ca3Ir4Sn13

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Title Dual role of an ac driving force and the underlying two distinct order-disorder transitions in the vortex phase diagram of Ca3Ir4Sn13
 
Creator KUMAR, S
SINGH, RP
THAMIZHAVEL, A
TOMY, CV
GROVER, AK
 
Subject Peak effect
Second magnetization peak
First-order transition
FLUX-LINE-LATTICE
HIGH-TEMPERATURE SUPERCONDUCTORS
2ND MAGNETIZATION PEAK
SINGLE-CRYSTALS
ANOMALOUS MAGNETIZATION
NEUTRON-DIFFRACTION
ELASTIC THEORY
MIXED-STATE
YBA2CU3O7-DELTA
2H-NBSE2
 
Description We present distinct demarcation of the Bragg glass (BG) to multi-domain vortex glass (VG) transition line and the eventual amorphization of the VG phase in a weakly pinned single crystal of the superconducting compound Ca3Ir4Sn13 on the basis of comprehension of the different yields about the second magnetization peak (SMP) anomaly in the dc magnetization and the corresponding anomalous feature in the ac susceptibility measurements. The shaking by a small ac magnetic field, inevitably present in the ac susceptibility measurements, is seen to result in contrasting responses in two different portions of the field-temperature (H, T) phase space of the multi-domain VG. In one of the portions, embracing the BG to VG transition across the onset of the SMP anomaly, the ac drive is surprisingly seen to assist the transformation of the well ordered BG phase to a lesser ordered VG phase. The BG phase exists as a superheated state over a small portion of the VG space and this attests to the first order nature of the BG to VG transition. (C) 2014 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-12-28T16:32:45Z
2014-12-28T16:32:45Z
2014
 
Type Article
 
Identifier PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 50669-75
0921-4534
1873-2143
http://dx.doi.org/10.1016/j.physc.2014.08.009
http://dspace.library.iitb.ac.in/jspui/handle/100/16893
 
Language English