TY - JOUR
T1 - Tc-suppression mechanism of Pr-doping in (R, Pr)Ba2Cu3O7
AU - Kodama, K.
AU - Shamoto, S.
AU - Harashina, H.
AU - Sato, M.
AU - Nishi, M.
AU - Kakurai, K.
N1 - Funding Information:
This work is supportedb y a Grant-in-Aidf or ScientificR eseacho n Priority Areas from the Ministry of EducationS, ciencea ndC ulture,Ja pan.
PY - 1996/5
Y1 - 1996/5
N2 - Neutron inelastic measurements on Y0.52Pr0.48Ba2Cu3O7 have been carried out. From the magnetic excitation spectra X″(q, ω), it is found that the reduction of the hole-carrier concentration p and the randomness effects introduced by the substitution of Y with Pr suppress the superconductivity. Based on the hole-trapping model, the origin of the randomness effects can be explained. The R-ion-size dependence of the suppression rate of the superconducting transition temperature, |dTc/d x|, can also be explained qualitatively. By measuring the Hall coefficients RH of R1-xPrxBa2Cu3O7 (R = Yb, Y, Gd and Sm), |d p /d x| is found to be insensitive to the species of R. For RBa2Cu3O7 (without Pr atoms), p decreases with increasing R-ion-size, which presents another possible explanation of the R-ion-size dependence of |dTc/d x|.
AB - Neutron inelastic measurements on Y0.52Pr0.48Ba2Cu3O7 have been carried out. From the magnetic excitation spectra X″(q, ω), it is found that the reduction of the hole-carrier concentration p and the randomness effects introduced by the substitution of Y with Pr suppress the superconductivity. Based on the hole-trapping model, the origin of the randomness effects can be explained. The R-ion-size dependence of the suppression rate of the superconducting transition temperature, |dTc/d x|, can also be explained qualitatively. By measuring the Hall coefficients RH of R1-xPrxBa2Cu3O7 (R = Yb, Y, Gd and Sm), |d p /d x| is found to be insensitive to the species of R. For RBa2Cu3O7 (without Pr atoms), p decreases with increasing R-ion-size, which presents another possible explanation of the R-ion-size dependence of |dTc/d x|.
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U2 - 10.1016/0921-4534(95)00739-3
DO - 10.1016/0921-4534(95)00739-3
M3 - Article
AN - SCOPUS:0030143627
SN - 0921-4534
VL - 263
SP - 333
EP - 335
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1-4
ER -