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Title: Effect of hexagonal patterned arrays and defect geometry on the critical current of superconducting films

Abstract

Understanding the effect of pinning on the vortex dynamics in superconductors is a key factor towards controlling critical current values. Large-scale simulations of vortex dynamics can provide a rational approach to achieve this goal. Here, we use the time-dependent Ginzburg-Landau equations to study thin superconducting films with artificially created pinning centers arranged periodically in hexagonal lattices. We calculate the critical current density for various geometries of the pinning centers—varying their size, strength, and density. Furthermore, we shed light upon the influence of pattern distortion on the magnetic-field-dependent critical current. We compare our result directly with available experimental measurements on patterned molybdenum-germanium films, obtaining good agreement. In conclusion, our results give important systematic insights into the mechanisms of pinning in these artificial pinning landscapes and open a path for tailoring superconducting films with desired critical current behavior.

Authors:
 [1];  [2];  [3];  [4];  [3]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Chicago, IL (United States). Computation Inst.
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Notre Dame, IN (United States). Dept. of Physics
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Divisionv; Northern Illinois Univ., DeKalb, IL (United States). Dept. of Physics
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
OSTI Identifier:
1343591
Alternate Identifier(s):
OSTI ID: 1342811
Grant/Contract Number:  
AC02-06CH11357; AC05-00OR22725; DMR-1407175
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 7; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; time-dependent Ginzburg-Landau; MoGe; large-scale simulations; patterining; vortex dynamics

Citation Formats

Sadovskyy, I. A., Wang, Y. L., Xiao, Z. -L., Kwok, W. -K., and Glatz, A. Effect of hexagonal patterned arrays and defect geometry on the critical current of superconducting films. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.075303.
Sadovskyy, I. A., Wang, Y. L., Xiao, Z. -L., Kwok, W. -K., & Glatz, A. Effect of hexagonal patterned arrays and defect geometry on the critical current of superconducting films. United States. doi:10.1103/PhysRevB.95.075303.
Sadovskyy, I. A., Wang, Y. L., Xiao, Z. -L., Kwok, W. -K., and Glatz, A. Tue . "Effect of hexagonal patterned arrays and defect geometry on the critical current of superconducting films". United States. doi:10.1103/PhysRevB.95.075303. https://www.osti.gov/servlets/purl/1343591.
@article{osti_1343591,
title = {Effect of hexagonal patterned arrays and defect geometry on the critical current of superconducting films},
author = {Sadovskyy, I. A. and Wang, Y. L. and Xiao, Z. -L. and Kwok, W. -K. and Glatz, A.},
abstractNote = {Understanding the effect of pinning on the vortex dynamics in superconductors is a key factor towards controlling critical current values. Large-scale simulations of vortex dynamics can provide a rational approach to achieve this goal. Here, we use the time-dependent Ginzburg-Landau equations to study thin superconducting films with artificially created pinning centers arranged periodically in hexagonal lattices. We calculate the critical current density for various geometries of the pinning centers—varying their size, strength, and density. Furthermore, we shed light upon the influence of pattern distortion on the magnetic-field-dependent critical current. We compare our result directly with available experimental measurements on patterned molybdenum-germanium films, obtaining good agreement. In conclusion, our results give important systematic insights into the mechanisms of pinning in these artificial pinning landscapes and open a path for tailoring superconducting films with desired critical current behavior.},
doi = {10.1103/PhysRevB.95.075303},
journal = {Physical Review B},
number = 7,
volume = 95,
place = {United States},
year = {Tue Feb 07 00:00:00 EST 2017},
month = {Tue Feb 07 00:00:00 EST 2017}
}

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Cited by: 3 works
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Works referenced in this record:

Freezing and thawing of artificial ice by thermal switching of geometric frustration in magnetic flux lattices
journal, August 2014

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  • Nature Nanotechnology, Vol. 9, Issue 9, p. 710-715
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