Pinning, flux diodes and ratchets for vortices interacting with conformal pinning arrays
Abstract
A conformal pinning array can be created by conformally transforming a uniform triangular pinning lattice to produce a new structure in which the six-fold ordering of the original lattice is conserved but where there is a spatial gradient in the density of pinning sites. Here we examine several aspects of vortices interacting with conformal pinning arrays and how they can be used to create a flux flow diode effect for driving vortices in different directions across the arrays. Under the application of an ac drive, a pronounced vortex ratchet effect occurs where the vortices flow in the easy direction of the array asymmetry. When the ac drive is applied perpendicular to the asymmetry direction of the array, it is possible to realize a transverse vortex ratchet effect where there is a generation of a dc flow of vortices perpendicular to the ac drive due to the creation of a noise correlation ratchet by the plastic motion of the vortices. We also examine vortex transport in experiments and compare the pinning effectiveness of conformal arrays to uniform triangular pinning arrays. In conclusion, we find that a triangular array generally pins the vortices more effectively at the first matching field and below,more »
- Authors:
-
[2];
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Notre Dame, IN (United States). Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northern Illinois Univ., DeKalb, IL (United States). Dept. of Physics
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Univ. of Notre Dame, IN (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1338737
- Alternate Identifier(s):
- OSTI ID: 1396973
- Report Number(s):
- LA-UR-16-20083
Journal ID: ISSN 0921-4534; TRN: US1700897
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physica. C, Superconductivity
- Additional Journal Information:
- Journal Volume: 533; Journal ID: ISSN 0921-4534
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Superconducting vortex; Conformal pinning; Ratchet
Citation Formats
Olson Reichhardt, C. J., Wang, Y. L., Xiao, Z. L., Kwok, W. K., Ray, D., Reichhardt, C., and Jankó, B. Pinning, flux diodes and ratchets for vortices interacting with conformal pinning arrays. United States: N. p., 2016.
Web. doi:10.1016/j.physc.2016.05.024.
Olson Reichhardt, C. J., Wang, Y. L., Xiao, Z. L., Kwok, W. K., Ray, D., Reichhardt, C., & Jankó, B. Pinning, flux diodes and ratchets for vortices interacting with conformal pinning arrays. United States. https://doi.org/10.1016/j.physc.2016.05.024
Olson Reichhardt, C. J., Wang, Y. L., Xiao, Z. L., Kwok, W. K., Ray, D., Reichhardt, C., and Jankó, B. Tue .
"Pinning, flux diodes and ratchets for vortices interacting with conformal pinning arrays". United States. https://doi.org/10.1016/j.physc.2016.05.024. https://www.osti.gov/servlets/purl/1338737.
@article{osti_1338737,
title = {Pinning, flux diodes and ratchets for vortices interacting with conformal pinning arrays},
author = {Olson Reichhardt, C. J. and Wang, Y. L. and Xiao, Z. L. and Kwok, W. K. and Ray, D. and Reichhardt, C. and Jankó, B.},
abstractNote = {A conformal pinning array can be created by conformally transforming a uniform triangular pinning lattice to produce a new structure in which the six-fold ordering of the original lattice is conserved but where there is a spatial gradient in the density of pinning sites. Here we examine several aspects of vortices interacting with conformal pinning arrays and how they can be used to create a flux flow diode effect for driving vortices in different directions across the arrays. Under the application of an ac drive, a pronounced vortex ratchet effect occurs where the vortices flow in the easy direction of the array asymmetry. When the ac drive is applied perpendicular to the asymmetry direction of the array, it is possible to realize a transverse vortex ratchet effect where there is a generation of a dc flow of vortices perpendicular to the ac drive due to the creation of a noise correlation ratchet by the plastic motion of the vortices. We also examine vortex transport in experiments and compare the pinning effectiveness of conformal arrays to uniform triangular pinning arrays. In conclusion, we find that a triangular array generally pins the vortices more effectively at the first matching field and below, while the conformal array is more effective at higher fields where interstitial vortex flow occurs.},
doi = {10.1016/j.physc.2016.05.024},
journal = {Physica. C, Superconductivity},
number = ,
volume = 533,
place = {United States},
year = {Tue May 31 00:00:00 EDT 2016},
month = {Tue May 31 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
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