High-T_c superconductivity induced by doping rare earth elements into CaFeAsF

Simple item page
dc.creatorCheng, Peng
dc.creatorShen, Bing
dc.creatorMu, Gang
dc.creatorZhu, Xiyu
dc.creatorHan, Fei
dc.creatorZeng, Bin
dc.creatorWen, Hai-Hu
dc.date2008-12-05
dc.date.accessioned2026-07-07T13:07:05Z
dc.date.available2026-07-07T13:07:05Z
dc.descriptionWe have successfully synthesized the fluoride-arsenide compounds Ca$_{1-x}$RE$_x$FeAsF (RE=Nd, Pr; x=0, 0.6). The x-ray powder diffraction confirmed that the main phases of our samples are Ca$_{1-x}$RE$_x$FeAsF with the ZrCuSiAs structure. By measuring resistivity, superconductivity was observed at 57.4 K in Nd-doped and 52.8 K in Pr-doped samples with x=0.6. Bulk superconductivity was also proved by the DC magnetization measurements in both samples. Hall effect measurements revealed hole-like charge carriers in the parent compound CaFeAsF with a clear resistivity anomaly below 118 K, while the Hall coefficient $R_H$ in the normal state is negative for the superconducting samples Ca$_{0.4}$Nd$_{0.6}$FeAsF and Ca$_{0.4}$Pr$_{0.6}$FeAsF. This indicates that the rare earth element doping introduces electrons into CaFeAsF which induces the high temperature superconductivity.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0812.1192
dc.identifierhttp://arxiv.org/abs/0812.1192
dc.identifierEurophys. Lett. 85, 67003 (2009)
dc.identifierdoi:10.1209/0295-5075/85/67003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/227982
dc.subjectSuperconductivity
dc.titleHigh-T_c superconductivity induced by doping rare earth elements into CaFeAsF
dc.typetext

Files

Collections

arXiv