TY - JOUR
T1 - Superconductivity at 10.2 K in the K-Bi-O system
AU - Khasanova, N. R.
AU - Yamamoto, A.
AU - Tajima, S.
AU - Wu, X. J.
AU - Tanabe, K.
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) of Japan.
PY - 1998/9/1
Y1 - 1998/9/1
N2 - New superconducting compound in the K-Bi-O system was obtained under high pressure. Pure perovskite phase can be prepared for K1-XBi1+XO3 in the range x = 0.0-0.2. Bulk superconductivity with Tc of 10.2 K is observed for samples K1-x Bi1+xO3 with x = 0.0-0.1. Transition temperature Tc does not change within this interval, though deviation from the range x = 0.0-0.1 leads to deterioration of superconducting properties. X-ray diffraction showed that the structure of the superconducting samples is cubic perovskite, which was confirmed by electron diffraction study. After comparing the present results with known bismuth oxide based superconductors we conclude that doping level plays a predominant role in determining the magnitude of Tc in these materials.
AB - New superconducting compound in the K-Bi-O system was obtained under high pressure. Pure perovskite phase can be prepared for K1-XBi1+XO3 in the range x = 0.0-0.2. Bulk superconductivity with Tc of 10.2 K is observed for samples K1-x Bi1+xO3 with x = 0.0-0.1. Transition temperature Tc does not change within this interval, though deviation from the range x = 0.0-0.1 leads to deterioration of superconducting properties. X-ray diffraction showed that the structure of the superconducting samples is cubic perovskite, which was confirmed by electron diffraction study. After comparing the present results with known bismuth oxide based superconductors we conclude that doping level plays a predominant role in determining the magnitude of Tc in these materials.
KW - Bismuth oxide based superconductor
KW - Doping level
KW - Structural transformation
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U2 - 10.1016/S0921-4534(98)00340-2
DO - 10.1016/S0921-4534(98)00340-2
M3 - Article
AN - SCOPUS:0032156905
SN - 0921-4534
VL - 305
SP - 275
EP - 280
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 3-4
ER -