Please use this identifier to cite or link to this item: http://dspace.utalca.cl/handle/1950/4269

 Title: Pinning action of correlated disorder against equilibrium properties of HgBa2Ca2Cu3Ox Authors: Thompson, J.R.Ossandon, J.G.Krusin-Elbaum, L.Christen, D.K.Kim, H.J.Song, K.J.Sorge, K.D.Ullmann, J.L. Keywords: T-C Superconductors; Critical-Current Densities; Splayed Columnar Issue Date: 2004 Citation: Physical Review B 69(10):10 Abstract: We report significant alteration of the equilibrium properties of the superconductor HgBa$_2$Ca$_2$Cu$_3$O$_x$ when correlated disorder in the form of randomly oriented columnar tracks is introduced via induced fission of Hg-nuclei. From studies of the equilibrium magnetization $M_{eq}$ and the persistent current density over a wide range of temperatures, applied magnetic fields, and track densities up to a matching field'' of 3.4 Tesla, we observe that the addition of more columnar tracks acting as pinning centers is progressively offset by reductions in the magnitude of $M_{eq}$. Invoking anisotropy induced refocusing'' of the random track array and incorporating vortex-defect interactions, we find that this corresponds to increases in the London penetration depth $\lambda$; this reduces the vortex line energy and consequently reduces the pinning effectiveness of the tracks. Description: Ossandon, J.G. Department of Engineering Sciences, Universidad de Talca, Curicó, Chile. URI: http://dspace.utalca.cl/handle/1950/4269 ISSN: 1098-0121 Appears in Collections: Artículos en publicaciones ISI - Universidad de Talca

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