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26 April 2024

» arxiv » cond-mat/0606562

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Effect of field dependent core size on reversible magnetization of high-$kappa$ superconductors
V. G. Kogan ; R. Prozorov ; S. L. Bud’ko ; P. C. Canfield ; J. R. Thompson ; J. Karpinski ; N. D. Zhigadlo ; P. Miranovi’c ; PostScript ; PDF ; Other formats ;
Date:	21 Jun 2006
Subject:	Superconductivity
Abstract:	The field dependence of the vortex core size $xi(B)$ is incorporated in the London model, in order to describe reversible magnetization $M(B,T)$ for a number of materials with large Ginzburg-Landau parameter $kappa$. The dependence $xi(B)$ is directly related to deviations in $M(ln B)$ from linear behavior prescribed by the standard London model. A simple method to extract $xi(B)$ from the magnetization data is proposed. For most materials examined, $xi(B)$ so obtained decreases with increasing field and is in qualitative agreement both with behavior extracted from $mu$SR and small angle neutron scattering data and with that predicted theoretically.
Source:	arXiv, cond-mat/0606562
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