Crossing fields in thin films of isotropic superconductors

Vlasko-Vlasov, V. K.; Colauto, Fabiano; Buzdin, Alexander A.; Carmo, D.; Andrade, A. M. H.; Oliveira, A. A. M.; Ortiz, W. A.; Rosenmann, D.; Kwok, W. -K.

doi:10.1103/PhysRevB.94.184502

Title: Crossing fields in thin films of isotropic superconductors

Journal Article · Fri Nov 04 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.94.184502· OSTI ID:1353037

Vlasko-Vlasov, V. K. ^[1]; Colauto, Fabiano ^[2]; Buzdin, Alexander A. ^[3]; Carmo, D. ^[4]; Andrade, A. M. H. ^[5]; Oliveira, A. A. M. ^[6]; Ortiz, W. A. ^[4]; Rosenmann, D. ^[1]; Kwok, W. -K. ^[1]

Argonne National Lab. (ANL), Argonne, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. Federal de Sao Carlos, Sao Carlos (Brazil)
Univ. Bordeaux, Talence Cedex (France)
Univ. Federal de Sao Carlos, Sao Carlos (Brazil)
Univ. Federal do Rio Grande do Sul, Porto Alegre (Brazil)
Ciencia e Tecnologia de Sao Paulo, Sao Paulo (Brazil)

We study interactions of perpendicular and longitudinal magnetic fields in niobium films of different thickness in a wide range of temperatures below the superconducting transition temperature (T_C) . In 100 nm Nb film at all temperatures the longitudinal field H_|| practically does not influence the dynamics of the normal flux. However, in 200nm Nb film, a considerable anisotropy in the vortex motion is found with advanced propagation of the normal flux along H_|| at T>TC/2 and the preferential jump-wise growth of the thermo-magnetic flux dendrites across H_|| at T < T_C. Appearance of the in-plane vortices and their cutting-reconnection with tilted vortices induced by the normal field H_|| is the reason of the observed anisotropy in the thicker film. Absence of the in-plane vortices and much smaller tilt of vortices generated by H_|| explain the isotropic normal flux dynamics in the thinner film. Lastly, our results open a new way of manipulating both slow vortex motion and fast thermo-magnetic avalanches.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Materials Sciences and Engineering Division; Sao Paulo Research Foundation (FAPESP)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1353037

Alternate ID(s):: OSTI ID: 1331019

Journal Information:: Physical Review B, Vol. 94, Issue 18; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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References (24)

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Magnon–fluxon interaction in a ferromagnet/superconductor heterostructure Dobrovolskiy, O. V.; Sachser, R.; Brächer, T. Nature Physics, Vol. 15, Issue 5 https://doi.org/10.1038/s41567-019-0428-5	journal	February 2019
Nucleation and propagation of thermomagnetic avalanches in thin-film superconductors (Review Article) Vestgården, J. I.; Johansen, T. H.; Galperin, Y. M. Low Temperature Physics, Vol. 44, Issue 6 https://doi.org/10.1063/1.5037549	journal	June 2018
Internal flux dynamics and stray field-mediated coupling in the AC susceptibility response of Nb/Ni thin-film bilayers Badilla, Juan Pablo; Cornejo, Daniel Journal of Physics D: Applied Physics, Vol. 51, Issue 11 https://doi.org/10.1088/1361-6463/aaaba9	journal	February 2018
Active control of thermomagnetic avalanches in superconducting Nb films with tunable anisotropy Carmo, D.; Colauto, F.; Andrade, A. M. H. de Superconductor Science and Technology, Vol. 31, Issue 11 https://doi.org/10.1088/1361-6668/aadffa	journal	October 2018
Magnetic flux penetration into micron-sized superconductor/ferromagnet bilayers Simmendinger, J.; Weigand, M.; Schütz, G. Superconductor Science and Technology, Vol. 33, Issue 2 https://doi.org/10.1088/1361-6668/ab54ab	journal	January 2020
Active control of thermomagnetic avalanches in superconducting Nb films with tunable anisotropy Carmo, D.; Colauto, F.; de Andrade, A. M. H. arXiv https://doi.org/10.48550/arxiv.1712.00300	text	January 2017
Magnon-Fluxon interaction in a ferromagnet/superconductor heterostructure Dobrovolskiy, O. V.; Sachser, R.; Brächer, T. arXiv https://doi.org/10.48550/arxiv.1901.06156	text	January 2019

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