Inhomogeneous Magnetic Field Penetration in Superconducting Niobium Films

• Authors: I. Abal'osheva , A. Abal'oshev , M. Cieplak , L. Zhu , C. Chien
• Languages of publication: EN

Abstracts

EN

The peculiarities of magnetic field penetration in the form of fingering or dendritic instabilities are studied by magneto-optical technique in the niobium films of different thickness. It is observed that the reduction of Nb film thickness reduces the threshold field for instabilities, in agreement with the theoretical predictions. In addition, it is shown that the silver overlayer deposited on the top of Nb film leads also to the enhancement of instabilities, in marked contrast to the effect of gold or aluminum overlayers, which are known to suppress instabilities.

Keywords

EN

74.25.Ha; 74.25.Uv; 74.70.Ad

Discipline

• 74.25.Ha: Magnetic properties including vortex structures and related phenomena(for vortices, magnetic bubbles, and magnetic domain structure, see 75.70.Kw)
• 74.25.Uv: Vortex phases (includes vortex lattices, vortex liquids, and vortex glasses)
• 74.70.Ad: Metals; alloys and binary compounds (including A15, MgB2, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 2
• Pages: 396-398

Dates

published

2010-08

Contributors

author

I. Abal'osheva

• Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland

author

A. Abal'oshev

• Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland

author

M. Cieplak

• Instytut Fizyki PAN, al. Lotników 32/46, 02-668 Warszawa, Poland

author

L. Zhu

• The Johns Hopkins University, Baltimore, MD 21218, USA

author

C. Chien

• The Johns Hopkins University, Baltimore, MD 21218, USA

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Identifiers

DOI

10.12693/APhysPolA.118.396