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; null Gazi; null 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

Racah Institute of Physics

The Hebrew University of Jerusalem

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

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	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

Keywords

Flux jumps
Superconductivity
Thin-walled cylinders

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2016.08.005

Cite this

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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.",

keywords = "Flux jumps, Superconductivity, Thin-walled cylinders",

author = "Tsindlekht, {M. I.} and Genkin, {V. M.} and I. Felner and F. Zeides and N. Katz and Gazi and Chromik",

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T1 - Giant flux jumps through a thin superconducting nb film in a vortex free region

AU - Tsindlekht, M. I.

AU - Genkin, V. M.

AU - Felner, I.

AU - Zeides, F.

AU - Katz, N.

AU - Gazi, null

AU - Chromik, null

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

KW - Superconductivity

KW - Thin-walled cylinders

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U2 - 10.1016/j.physc.2016.08.005

DO - 10.1016/j.physc.2016.08.005

M3 - مقالة

SN - 0921-4534

VL - 529

SP - 1

EP - 7

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

ER -

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

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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