Formation of columnar defects in high superconductors by swift heavy ions

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Abstract

Experimental data on the variation of the size of columnar defects with the electronic stopping power (Formula presented) are analyzed for Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O. A model is applied that is based on the thermal spike concept and which was previously successfully used for irradiated insulating materials. The width of the thermal spike a(0) obtained from the analysis is 4.4 and 4.65 nm for Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O, respectively, which are in good agreement with the value for insulators. The fraction of the energy deposited to the thermal spike in the phonon system (Formula presented) is lower in high-(Formula presented) superconductors (HTCS’s) than in insulators. This reduction is attributed to the anisotropy of the electron scattering. The model is suitable to predict the size of columnar defects in HTCS’s.

Original languageEnglish
Pages (from-to)12458-12463
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number17
DOIs
Publication statusPublished - Jan 1 1996

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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