Surface pinning in amorphous ZrTiCuNiBe alloy

Details Surface pinning in amorphous ZrTiCuNiBe alloy Surface pinning in amorphous ZrTiCuNiBe alloy

2004-05-26

arxiv.org/abs/cond-mat/0405616v1

Phys. Rev. B 71, 092504 (2005)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.71.092504

We have measured the amplitude and the phase of an electromagnetic (EM) field radiated from superconductor (amorphous ZrTiCuNiBe alloy) in the mixed state due to interaction of the flux lattice with an elastic wave. The results undoubtedly point to an essential contribution of a surface pinning into the flux lattice dynamics. We propose a model that describes radiation of EM field from superconductors with non-uniform pinning. The model allows to reconstruct the viscosity and the Labush parameters from the experimental data. The behavior of the Labush parameter can be qualitatively explained in terms of the collective pinning theory with the allowance of thermal fluctuations.

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