Campbell response in type-II superconductors under strong pinning conditions
Abstract
Measuring the ac magnetic response of a type II superconductor provides valuable information on the pinning landscape (pinscape) of the material. We use strong pinning theory to derive a microscopic expression for the Campbell length λC, the penetration depth of the ac signal. We show that λC is determined by the jump in the pinning force, in contrast to the critical current jc, which involves the jump in pinning energy. We demonstrate that the Campbell lengths generically differ for zero-field-cooled and field-cooled samples and predict that hysteretic behavior can appear in the latter situation. As a result, we compare our findings with new experimental data and show the potential of this technique in providing information on the material’s pinscape.
- Authors:
-
- ETH Zurich, Zurich (Switzerland)
- Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1234456
- Alternate Identifier(s):
- OSTI ID: 1225762
- Report Number(s):
- IS-J-8860
Journal ID: ISSN 0031-9007; PRLTAO
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 115; Journal Issue: 20; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Willa, R., Geshkenbein, V. B., Prozorov, R., and Blatter, G. Campbell response in type-II superconductors under strong pinning conditions. United States: N. p., 2015.
Web. doi:10.1103/PhysRevLett.115.207001.
Willa, R., Geshkenbein, V. B., Prozorov, R., & Blatter, G. Campbell response in type-II superconductors under strong pinning conditions. United States. https://doi.org/10.1103/PhysRevLett.115.207001
Willa, R., Geshkenbein, V. B., Prozorov, R., and Blatter, G. Wed .
"Campbell response in type-II superconductors under strong pinning conditions". United States. https://doi.org/10.1103/PhysRevLett.115.207001. https://www.osti.gov/servlets/purl/1234456.
@article{osti_1234456,
title = {Campbell response in type-II superconductors under strong pinning conditions},
author = {Willa, R. and Geshkenbein, V. B. and Prozorov, R. and Blatter, G.},
abstractNote = {Measuring the ac magnetic response of a type II superconductor provides valuable information on the pinning landscape (pinscape) of the material. We use strong pinning theory to derive a microscopic expression for the Campbell length λC, the penetration depth of the ac signal. We show that λC is determined by the jump in the pinning force, in contrast to the critical current jc, which involves the jump in pinning energy. We demonstrate that the Campbell lengths generically differ for zero-field-cooled and field-cooled samples and predict that hysteretic behavior can appear in the latter situation. As a result, we compare our findings with new experimental data and show the potential of this technique in providing information on the material’s pinscape.},
doi = {10.1103/PhysRevLett.115.207001},
journal = {Physical Review Letters},
number = 20,
volume = 115,
place = {United States},
year = {Wed Nov 11 00:00:00 EST 2015},
month = {Wed Nov 11 00:00:00 EST 2015}
}
Web of Science
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