TY - JOUR
T1 - Bulk superconductivity in Fe1+yTe0.6Se0.4 induced by removal of excess Fe
AU - Zhou, Wei
AU - Sun, Yue
AU - Zhang, Shuo
AU - Zhuang, Jincheng
AU - Yuan, Feifei
AU - Li, Xiong
AU - Shi, Zhixiang
AU - Yamada, Tatsuhiro
AU - Tsuchiya, Yuji
AU - Tamegai, Tsuyoshi
N1 - Publisher Copyright:
© 2014 The Physical Society of Japan.
PY - 2014/6/15
Y1 - 2014/6/15
N2 - Experimental evidences from transport, magnetic, and magneto-optical (MO) image measurements confirmed that arsenic (As) vapor annealing was another effective way to induce bulk superconductivity with isotropic, large, and homogenous superconducting critical current density (Jc) in Fe1+yTe 0.6Se0.4 single crystal. Since As is an exotic and easily detectable heavy element to Fe1+yTe0.6Se0.4 single crystal, As vapor annealing is very advantageous for the study of annealing mechanism. Detailed micro-structural and elemental analyses exclude the possibility that intercalating or doping effect may happen in the other post-annealing methods, proving that Fe reacts with As on the surface of the crystal and the reaction itself acts as a driving force to drag excess Fe out. The removal of excess Fe results in the good superconductivity performance.
AB - Experimental evidences from transport, magnetic, and magneto-optical (MO) image measurements confirmed that arsenic (As) vapor annealing was another effective way to induce bulk superconductivity with isotropic, large, and homogenous superconducting critical current density (Jc) in Fe1+yTe 0.6Se0.4 single crystal. Since As is an exotic and easily detectable heavy element to Fe1+yTe0.6Se0.4 single crystal, As vapor annealing is very advantageous for the study of annealing mechanism. Detailed micro-structural and elemental analyses exclude the possibility that intercalating or doping effect may happen in the other post-annealing methods, proving that Fe reacts with As on the surface of the crystal and the reaction itself acts as a driving force to drag excess Fe out. The removal of excess Fe results in the good superconductivity performance.
UR - https://www.scopus.com/pages/publications/84908384507
U2 - 10.7566/JPSJ.83.064704
DO - 10.7566/JPSJ.83.064704
M3 - 文章
AN - SCOPUS:84908384507
SN - 0031-9015
VL - 83
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 6
M1 - 064704
ER -