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Title: Nonequilibrium steady states of driven magnetic flux lines in disordered type-II superconductors

Journal Article · · Superconductor Science and Technology
 [1];  [2];  [1]
  1. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
  2. US Air Force, Wright-Patterson Air Force Base, OH (United States)

We investigate driven magnetic flux lines in layered type-II superconductors subject to various configurations of strong point or columnar pinning centers by means of a three-dimensional elastic line model and Metropolis Monte Carlo simulations. We characterize the resulting nonequilibrium steady states by means of the force–velocity/current–voltage curve, static structure factor, mean vortex radius of gyration, number of double-kink and half-loop excitations, and velocity/voltage noise spectrum. Here, we compare the results for the above observables for randomly distributed point and columnar defects, and demonstrate that the three-dimensional flux line structures and their fluctuations lead to a remarkable variety of complex phenomena in the steady-state transport properties of bulk superconductors.

Research Organization:
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
FG02-09ER46613; SC0002308
OSTI ID:
1855151
Journal Information:
Superconductor Science and Technology, Vol. 23, Issue 2; ISSN 0953-2048
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Relaxation and glassy dynamics in disordered type-II superconductors journal November 2011

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