Boron isotope effect in single crystals of ErNi${}_2$B${}_2$C superconductor

Abstract

The influence of local moment magnetism on the boron isotope effect of T${}_c$ was studied on single crystals of ErNi${}_2$B${}_2$C. Values of the partial isotope effect exponent of ${\alpha }_B$=0.10$\pm$0.02 and ${\alpha }_B$=0.10$\pm$0.04 were obtained based on two different criteria applied to extract $T_c$. No significant change in the partial isotope effect exponent compared to the ones obtained for LuNi${}_2$B${}_2$C was observed. Based on this result we conclude that pair-breaking due to the Er local magnetic moment appears to have no detectable influence on boron isotope effect of T${}_c$.

7 pages, 3 figures

References in corpus (2)

• Anomalous temperature-dependent transport in YbNi2B2C and its correlation to microstructural features
• Evolution of ground state and upper critical field in R(1-x)GdxNi2B2C (R = Lu, Y): Coexistence of superconductivity and spin-glass state