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Title: Self-healing patterns in ferromagnetic-superconducting hybrids

Abstract

We study magnetic flux dynamic effects in a superconducting bridge with thin soft magnetic stripes placed either on top or under the bridge. Voltage-current (VI) measurements reveal that the edges of magnetic stripes oriented transvers or along the bridge introduce channels or barriers for vortex motion, resulting in the decrease or increase of the critical current, respectively. We demonstrate a remarkable self-healing effect whereby the magnetic pinning strength for the longitudinal stripes increases with current. The self-field of the current polarizes the magnetic stripes along their width, which enhances the stray fields at their edges and creates a dynamic vortex pinning landscape to impede vortex flow. Our results highlight new strategies to engineer adaptive pinning topologies in superconducting-ferromagnetic hybrids.

Authors:
; ; ; ; ; ; ;
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)
OSTI Identifier:
1357060
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Superconductor Science and Technology; Journal Volume: 28; Journal Issue: 3
Country of Publication:
United States
Language:
English

Citation Formats

Vlasko-Vlasov, V. K., Palacious, E., Rosenmann, D., Pearson, J., Jia, Y., Wang, Y. L., Welp, U., and Kwok, W-K. Self-healing patterns in ferromagnetic-superconducting hybrids. United States: N. p., 2015. Web. doi:10.1088/0953-2048/28/3/035006.
Vlasko-Vlasov, V. K., Palacious, E., Rosenmann, D., Pearson, J., Jia, Y., Wang, Y. L., Welp, U., & Kwok, W-K. Self-healing patterns in ferromagnetic-superconducting hybrids. United States. doi:10.1088/0953-2048/28/3/035006.
Vlasko-Vlasov, V. K., Palacious, E., Rosenmann, D., Pearson, J., Jia, Y., Wang, Y. L., Welp, U., and Kwok, W-K. Wed . "Self-healing patterns in ferromagnetic-superconducting hybrids". United States. doi:10.1088/0953-2048/28/3/035006.
@article{osti_1357060,
title = {Self-healing patterns in ferromagnetic-superconducting hybrids},
author = {Vlasko-Vlasov, V. K. and Palacious, E. and Rosenmann, D. and Pearson, J. and Jia, Y. and Wang, Y. L. and Welp, U. and Kwok, W-K},
abstractNote = {We study magnetic flux dynamic effects in a superconducting bridge with thin soft magnetic stripes placed either on top or under the bridge. Voltage-current (VI) measurements reveal that the edges of magnetic stripes oriented transvers or along the bridge introduce channels or barriers for vortex motion, resulting in the decrease or increase of the critical current, respectively. We demonstrate a remarkable self-healing effect whereby the magnetic pinning strength for the longitudinal stripes increases with current. The self-field of the current polarizes the magnetic stripes along their width, which enhances the stray fields at their edges and creates a dynamic vortex pinning landscape to impede vortex flow. Our results highlight new strategies to engineer adaptive pinning topologies in superconducting-ferromagnetic hybrids.},
doi = {10.1088/0953-2048/28/3/035006},
journal = {Superconductor Science and Technology},
number = 3,
volume = 28,
place = {United States},
year = {Wed Jan 28 00:00:00 EST 2015},
month = {Wed Jan 28 00:00:00 EST 2015}
}