Energy of dendritic avalanches in thin-film superconductors

Qureishy, T.; Vestgården, J. I.; Qviller, A. J.; Fjellvåg, A. S.; Meckbach, J. M.; Torgovkin, Andrii; Johansen, T. H.; Ilin, K.; Siegel, M.; Maasilta, Ilari; Mikheenko, P.

doi:10.1063/1.5045682

Publisher's PDF

Katso/Avaa

4.8 Mb

Lataukset:

Show download details Hide download details

Qureishy, T., Vestgården, J. I., Qviller, A. J., Fjellvåg, A. S., Meckbach, J. M., Torgovkin, A., Johansen, T. H., Ilin, K., Siegel, M., Maasilta, I., & Mikheenko, P. (2018). Energy of dendritic avalanches in thin-film superconductors. AIP Advances, 8(8), Article 085128. https://doi.org/10.1063/1.5045682

Julkaistu sarjassa

AIP Advances

Tekijät

Qureishy, T. |

Vestgården, J. I. |

Qviller, A. J. |

Fjellvåg, A. S. |

Meckbach, J. M. |

Torgovkin, Andrii |

Johansen, T. H. |

Ilin, K. |

Siegel, M. |

Maasilta, Ilari |

Mikheenko, P.

Päivämäärä

2018

Oppiaine

Nanoscience Center Nanoscience Center

Tekijänoikeudet

A method for calculating stored magnetic energy in a thin superconducting film based on quantitative magneto-optical imaging is developed. Energy and magnetic moment are determined with these calculations for full hysteresis loops in a thin film of the superconductor NbN. Huge losses in energy are observed when dendritic avalanches occur. Magnetic energy, magnetic moment, sheet current and magnetic flux distributions, all extracted from the same calibrated magneto-optical images, are analyzed and discussed. Dissipated energy and the loss in moment when dendritic avalanches occur are related to each other. Calculating these losses for specific spatially-resolved flux avalanches is a great advantage, because of their unpredictable and non-reproducible nature. The relative losses in energy are much higher than the relative losses in moment.

Julkaisija

AIP Publishing LLC

ISSN Hae Julkaisufoorumista

2158-3226

Rahoittaja(t)

Suomen Akatemia

Rahoitusohjelmat(t)

Akatemiahanke, SA

Lisätietoja rahoituksesta

The authors thank S. Kumar for assistance with dc magnetometry measurements. The Research Council of Norway is acknowledged for the support to the Norwegian Micro- and Nano-Fabrication Facility, NorFab (197411/V30), as is the Academy of Finland (Project no. 298667).

Lisenssi

Ellei muuten mainita, aineiston lisenssi on CC BY 4.0

Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.

Magnetization Dynamics in Proximity-Coupled Superconductor-Ferromagnet-Superconductor Multilayers

Golovchanskiy, I.A.; Abramov, N.N.; Stolyarov, V.S.; Chichkov, V.I.; Silaev, M.; Shchetinin, I.V.; Golubov, A.A.; Ryazanov, V.V.; Ustinov, A.V.; Kupriyanov, M.Yu. (American Physical Society (APS), 2020)

In this work, magnetization dynamics is studied in superconductor-ferromagnet-superconductor three-layered films in a wide frequency, field, and temperature ranges using the broad-band ferromagnetic resonance measurement ...
Quasiclassical free energy of superconductors : Disorder-driven first-order phase transition in superconductor/ferromagnetic-insulator bilayers

Virtanen, Pauli; Vargunin, Artjom; Silaev, Mikhail (American Physical Society, 2020)

n the seminal work by G. Eilenberger, Z. Phys. 214, 195 (1968), a closed-form expression for the free energy of inhomogeneous spin-singlet superconductor in terms of quasiclassical propagators has been suggested. However, ...
Magnetoelectric effects in superconductor/ferromagnet bilayers

Rabinovich, D. S.; Bobkova, I. V.; Bobkov, A. M.; Silaev, M. A. (American Physical Society, 2019)

We demonstrate that the hybrid structures consisting of a superconducting layer with an adjacent spin-textured ferromagnet demonstrate the variety of equilibrium magnetoelectric effects originating from coupling between ...
Superconducting size effect in thin films under electric field: Mean-field self-consistent model

Virtanen, P.; Braggio, A.; Giazotto, F. (American Physical Society, 2019)

We consider the effects of an externally applied electrostatic field on superconductivity, self-consistently within a BCS mean-field model, for a clean three-dimensional (3D) metal thin film. The electrostatic change in ...
Chirality selective spin interactions mediated by the moving superconducting condensate

Rabinovich, D. S.; Bobkova, I. V.; Bobkov, A. M.; Silaev, Mikhail (American Physical Society, 2018)

We show that superconducting correlations in the presence of nonzero condensate velocity can mediate the peculiar interaction between localized spins that breaks the global inversion symmetry of magnetic moments. The proposed ...