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Transverse commensurability effect for vortices on periodic pinning arrays

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [1]
  1. Los Alamos National Laboratory
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Using computer simulations, we demonstrate a type of commensurability that occurs for vortices moving longitudinally through periodic pinning arrays in the presence of an additional transverse driving force. As a function of vortex density, there is a series of broad maxima in the transverse critical depinning force that do not fall at the matching fields where the number of vortices equals an integer multiple of the number of pinning sites. The commensurability effects are associated with dynamical states in which evenly spaced structures consisting of one or more moving rows of vortices form between rows of pinning sites. Remarkably, the critical transverse depinning force can be more than an order of magnitude larger than the longitudinal depinning force.
Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
DOE
DOE Contract Number:
AC52-06NA25396
OSTI ID:
960570
Report Number(s):
LA-UR-08-05305; LA-UR-08-5305
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 18 Vol. 78; ISSN 1098-0121
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
COMPUTERIZED SIMULATION
DENSITY
FUNCTIONS
VORTICES