TY - JOUR
T1 - Enhancement of superconductivity in FeSe 1-xTe x by Li doping
AU - Yang, Chia Ming
AU - Chen, Po Wei
AU - Chen, In Gann
AU - Qi, Xiao Ding
AU - Yan, Der Chung
AU - Wu, Maw Kuen
PY - 2012/9
Y1 - 2012/9
N2 - The study investigated the chemical doping effect of Li in the Fe(Se,Te) system. With the addition of Li, the NiAs phase was precipitated, which resulted in worse superconductivity in FeSe samples. The XRD results indicated that chemical stress was found in the FeTe system which showed no superconductivity by doping Li. However, it was noticeable that the T c was increased (11.5K) and the enhancement of diamagnetic force was found in FeSe 1-xTe x (x=0.51) with 1wt% Li doping. The lattice constant of the c-axis increased with increasing content of Li, implying that the Li interstitial sites are along the c-axis. Furthermore, the XRD results showed that the enhanced superconductivity of FeSe 1-xTe x resulted from the large stress fields in FeSe 1-xTe x. The stress field effect was retarded by the large quantity of Li additives.
AB - The study investigated the chemical doping effect of Li in the Fe(Se,Te) system. With the addition of Li, the NiAs phase was precipitated, which resulted in worse superconductivity in FeSe samples. The XRD results indicated that chemical stress was found in the FeTe system which showed no superconductivity by doping Li. However, it was noticeable that the T c was increased (11.5K) and the enhancement of diamagnetic force was found in FeSe 1-xTe x (x=0.51) with 1wt% Li doping. The lattice constant of the c-axis increased with increasing content of Li, implying that the Li interstitial sites are along the c-axis. Furthermore, the XRD results showed that the enhanced superconductivity of FeSe 1-xTe x resulted from the large stress fields in FeSe 1-xTe x. The stress field effect was retarded by the large quantity of Li additives.
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U2 - 10.1088/0953-2048/25/9/095010
DO - 10.1088/0953-2048/25/9/095010
M3 - Article
AN - SCOPUS:84864489904
SN - 0953-2048
VL - 25
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
IS - 9
M1 - 095010
ER -