TY - JOUR
T1 - Superconductivity and low-temperature structural phase transition in La1.98-xCe0.02BaxCuO4
AU - Koike, Y.
AU - Kawaguchi, T.
AU - Watanabe, N.
AU - Noji, T.
AU - Saito, Y.
N1 - Funding Information:
Acknowledgements -This work was suppurtedb y a Grant-in-Aid for Scientific Research¢ ~n Priority Areas "Mechanismo f Superconductivity" from the Ministry of Education, Science and Culture, Japan.
PY - 1991/7
Y1 - 1991/7
N2 - Effects of the partial substitution of Ce for La on the superconductivity and the low-temperature structural phase transition have been investigated in La2-xBaxCuO4. The local minimum of Tc as a function of Ba concentration x, appearing near x = 0.125 for La2-xBaxCuO4, clearly shifts to x = 0.145 for La1.98-xCe0.02BaxCuO4. The range of x, where a resistance minimum relating to the low-temperature structural phase transition appears, shifts to that of larger x values, too. These suggest that the low-temperature structural phase transition around x = 0.125 in La2-xBaxCuO4 is due to the optimum hole concentration of 0.125 per Cu atom rather than plausible atomic ordering of La and Ba.
AB - Effects of the partial substitution of Ce for La on the superconductivity and the low-temperature structural phase transition have been investigated in La2-xBaxCuO4. The local minimum of Tc as a function of Ba concentration x, appearing near x = 0.125 for La2-xBaxCuO4, clearly shifts to x = 0.145 for La1.98-xCe0.02BaxCuO4. The range of x, where a resistance minimum relating to the low-temperature structural phase transition appears, shifts to that of larger x values, too. These suggest that the low-temperature structural phase transition around x = 0.125 in La2-xBaxCuO4 is due to the optimum hole concentration of 0.125 per Cu atom rather than plausible atomic ordering of La and Ba.
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U2 - 10.1016/0038-1098(91)90081-6
DO - 10.1016/0038-1098(91)90081-6
M3 - Article
AN - SCOPUS:0026190205
VL - 79
SP - 155
EP - 158
JO - Solid State Communications
JF - Solid State Communications
SN - 0038-1098
IS - 2
ER -