Publication
Title
Direct observation of nanometer-scale pinning sites in $(Nd_{0.33}Eu_{0.20}Gd_{0.47})Ba_{2}Cu_{3}O_{7-\delta}$ single crystals
Author
Abstract
 We report on the observation of self-organized stripe-like structures on the as-grown surface and in the bulk of (Nd,Eu,Gd)Ba2Cu3Oy single crystals. The periodicity of the stripes on the surface lies between 500800 nm. These are possibly the growth steps of the crystal. Transmission electron microscopy investigations revealed stripes of periodicity in the range of 2040 nm in the bulk. From electron back scattered diffraction investigations, no crystallographic misorientation due to the nanostripes has been found. Scanning tunneling spectroscopic experiments revealed nonsuperconducting regions, running along twin directions, which presumably constitute strong pinning sites.
Language
English
Source (journal)
Europhysics letters. - Paris
Publication
Paris : 2008
ISSN
0295-5075
Volume/pages
83:3(2008), p. 37005,1-37005,4
ISI
000259022600032
Full text (Publisher's DOI)
UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address