Formation of columnar defects in high-Tc superconductors by swift heavy ions

G. Szenes

doi:10.1103/PhysRevB.54.12458

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Formation of columnar defects in high-Tc superconductors by swift heavy ions

G. Szenes

DOI 10.1103/PhysRevB.54.12458 · Physical Review B

T1

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Abstract

Experimental data on the variation of the size of columnar defects with the electronic stopping power Se 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 gSe is lower in high-Tc 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. © 1996 The American Physical Society.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown