Giant flux jumps through a thin superconducting nb film in a vortex free region

M. I. Tsindlekht; V. M. Genkin; I. Felner; F. Zeides; N. Katz; Gazi; Chromik

doi:10.1016/j.physc.2016.08.005

Giant flux jumps through a thin superconducting nb film in a vortex free region

M. I. Tsindlekht^*, V. M. Genkin, I. Felner, F. Zeides, N. Katz, Gazi, Chromik

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We measure the dynamics of magnetic field penetration into thin-walled superconducting niobium cylinders. It is shown that magnetic field penetrates through the wall of a cylinder in a series of giant jumps with amplitude 1 - 2 mT and duration of less than a microsecond in a wide range of magnetic fields, including the vortex free region. Surprisingly, the jumps take place when the total current in the wall, not the current density, exceeds a critical value. In addition, there are small jumps and/or smooth penetration, but their contribution reaches only ≃ 20 % of the total penetrating flux. The number of jumps decreases with increased temperature. Thermomagnetic instabilities cannot explain the experimental observations.

Original language	American English
Pages (from-to)	1-7
Number of pages	7
Journal	Physica C: Superconductivity and its Applications
Volume	529
DOIs	https://doi.org/10.1016/j.physc.2016.08.005
State	Published - 15 Oct 2016

Bibliographical note

Funding Information:
We thank J. Kolacek, G.I. Leviev, P. Lipavsky and V.A. Tulin for fruitful discussions. We are deeply grateful to Yu. A. Genenko for careful reading of the manuscript and very useful comments. We acknowledge unknown referee for his very useful remarks. This work was done within the framework of the NanoSC-COST Action MP1201. Financial support of the grant agency VEGA in projects nos. 2/0173/13 and 2/0120/14 are kindly appreciated. We acknowledge partial support of ERC grant number 335933.

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

Flux jumps
Superconductivity
Thin-walled cylinders

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10.1016/j.physc.2016.08.005

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title = "Giant flux jumps through a thin superconducting nb film in a vortex free region",

abstract = "We measure the dynamics of magnetic field penetration into thin-walled superconducting niobium cylinders. It is shown that magnetic field penetrates through the wall of a cylinder in a series of giant jumps with amplitude 1 - 2 mT and duration of less than a microsecond in a wide range of magnetic fields, including the vortex free region. Surprisingly, the jumps take place when the total current in the wall, not the current density, exceeds a critical value. In addition, there are small jumps and/or smooth penetration, but their contribution reaches only ≃ 20 % of the total penetrating flux. The number of jumps decreases with increased temperature. Thermomagnetic instabilities cannot explain the experimental observations.",

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AU - Tsindlekht, M. I.

AU - Genkin, V. M.

AU - Felner, I.

AU - Zeides, F.

AU - Katz, N.

AU - Gazi,

AU - Chromik,

N1 - Funding Information: We thank J. Kolacek, G.I. Leviev, P. Lipavsky and V.A. Tulin for fruitful discussions. We are deeply grateful to Yu. A. Genenko for careful reading of the manuscript and very useful comments. We acknowledge unknown referee for his very useful remarks. This work was done within the framework of the NanoSC-COST Action MP1201. Financial support of the grant agency VEGA in projects nos. 2/0173/13 and 2/0120/14 are kindly appreciated. We acknowledge partial support of ERC grant number 335933. Publisher Copyright: © 2016 Elsevier B.V.

PY - 2016/10/15

Y1 - 2016/10/15

N2 - We measure the dynamics of magnetic field penetration into thin-walled superconducting niobium cylinders. It is shown that magnetic field penetrates through the wall of a cylinder in a series of giant jumps with amplitude 1 - 2 mT and duration of less than a microsecond in a wide range of magnetic fields, including the vortex free region. Surprisingly, the jumps take place when the total current in the wall, not the current density, exceeds a critical value. In addition, there are small jumps and/or smooth penetration, but their contribution reaches only ≃ 20 % of the total penetrating flux. The number of jumps decreases with increased temperature. Thermomagnetic instabilities cannot explain the experimental observations.

AB - We measure the dynamics of magnetic field penetration into thin-walled superconducting niobium cylinders. It is shown that magnetic field penetrates through the wall of a cylinder in a series of giant jumps with amplitude 1 - 2 mT and duration of less than a microsecond in a wide range of magnetic fields, including the vortex free region. Surprisingly, the jumps take place when the total current in the wall, not the current density, exceeds a critical value. In addition, there are small jumps and/or smooth penetration, but their contribution reaches only ≃ 20 % of the total penetrating flux. The number of jumps decreases with increased temperature. Thermomagnetic instabilities cannot explain the experimental observations.

KW - Flux jumps

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ER -

Giant flux jumps through a thin superconducting nb film in a vortex free region

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Bibliographical note

Keywords

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