Campbell response in type-II superconductors under strong pinning conditions

Willa, R.; Geshkenbein, V. B.; Prozorov, R.; Blatter, G.

doi:10.1103/PhysRevLett.115.207001

Campbell response in type-II superconductors under strong pinning conditions

Journal Article · Wed Nov 11 00:00:00 EST 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.115.207001· OSTI ID:1234456

Willa, R. ^[1]; Geshkenbein, V. B. ^[1]; Prozorov, R. ^[2]; Blatter, G. ^[1]

ETH Zurich, Zurich (Switzerland)
Iowa State Univ., Ames, IA (United States)

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 λ_C is determined by the jump in the pinning force, in contrast to the critical current j_c, 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.

View Accepted Manuscript (DOE)

Research Organization:: Ames Lab. (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1234456

Alternate ID(s):: OSTI ID: 1225762

Report Number(s):: IS-J--8860

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 115; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Strong-pinning regimes by spherical inclusions in anisotropic type-II superconductors Willa, R.; Koshelev, A. E.; Sadovskyy, I. A. Superconductor Science and Technology, Vol. 31, Issue 1 https://doi.org/10.1088/1361-6668/aa939e	journal	November 2017
Strong pinning theory of thermal vortex creep in type-II superconductors Buchacek, M.; Willa, R.; Geshkenbein, V. B. Physical Review B, Vol. 100, Issue 1 https://doi.org/10.1103/physrevb.100.014501	journal	July 2019
Probing the pinning landscape in type-II superconductors via Campbell penetration depth Willa, R.; Geshkenbein, V. B.; Blatter, G. Physical Review B, Vol. 93, Issue 6 https://doi.org/10.1103/physrevb.93.064515	journal	February 2016
Vortex dynamics in type-II superconductors under strong pinning conditions Thomann, A. U.; Geshkenbein, V. B.; Blatter, G. Physical Review B, Vol. 96, Issue 14 https://doi.org/10.1103/physrevb.96.144516	journal	October 2017
Thermal creep induced by cooling a superconducting vortex lattice Willa, Roland; Galvis, Jose Augusto; Benito-Llorens, Jose Physical Review Research, Vol. 2, Issue 1 https://doi.org/10.1103/physrevresearch.2.013125	journal	February 2020
Thermal creep induced by cooling a superconducting vortex lattice Willa, Roland; Augusto Galvis, Jose; Benito-Llorens, Jose ETH Zurich https://doi.org/10.3929/ethz-b-000467894	text	January 2020
Probing the pinning landscape in type-II superconductors via Campbell penetration depth Willa, R.; Geshkenbein, V. B.; Blatter, G. arXiv https://doi.org/10.48550/arxiv.1512.06256	text	January 2015
Strong-pinning regimes by spherical inclusions in anisotropic type-II superconductors Willa, R.; Koshelev, A. E.; Sadovskyy, I. A. arXiv https://doi.org/10.48550/arxiv.1708.01653	text	January 2017
Strong pinning theory of thermal vortex creep in type II superconductors Buchacek, Martin; Geshkenbein, Vadim B.; Willa, Roland arXiv https://doi.org/10.48550/arxiv.1903.09083	text	January 2019

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