Fractal dimension of cluster boundaries in porous polycrystalline HTSC materials

The fractal dimension of the boundaries of clusters formed by pores and granules in polycrystalline materials is shown to be determined by the sample density and crystallite sizes. The dependence of the fractal dimension on the density has a maximum. It is shown that the maximum diamagnetic response...

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Veröffentlicht in:	Physics of the solid state 2012-10, Vol.54 (10), p.1947-1950
Hauptverfasser:	Bykov, A. A., Terent’ev, K. Yu, Gokhfeld, D. M., Petrov, M. I.
Format:	Artikel
Sprache:	eng
Schlagworte:	High temperature superconductors Physics Physics and Astronomy Solid State Physics Superconductivity
Online-Zugang:	Volltext
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Zusammenfassung:	The fractal dimension of the boundaries of clusters formed by pores and granules in polycrystalline materials is shown to be determined by the sample density and crystallite sizes. The dependence of the fractal dimension on the density has a maximum. It is shown that the maximum diamagnetic response can be obtained in a porous high-temperature superconductor with a porosity of 50–60% and small crystallite sizes.
ISSN:	1063-7834 1090-6460
DOI:	10.1134/S1063783412100095