TY - JOUR
T1 - Magneto-resistance, thermal conductivity, thermo-electric power and specific heat of superconductor Gd0.95Pr0.05Ba 2Cu2.94M0.06O7-δ (M=Fe, Ni, Zn and Mn)
AU - Chakraborty, Tirthankar
AU - Gahtori, Bhasker
AU - Soni, Ajay
AU - Okram, G. S.
AU - Agrawal, S. K.
AU - Chen, S. Y.
AU - Kuo, Y. K.
AU - Ahsan, M. A.H.
AU - Rao, Ashok
PY - 2011/9/1
Y1 - 2011/9/1
N2 - In the present paper, we present thermal and electrical transport properties of pristine and co-doped samples of high temperature superconductors Gd0.95Pr0.05Ba2Cu2.94M 0.06O7-δ. It is found that all the samples, except the Mn co-doped sample, show metallic behavior in the normal state. It is observed that the upper critical field has a correlation with the substituent site of the co-dopant. Thermal conductivity κ(T) of all the samples, except the one with Zn co-doping, exhibits a hump like structure around their respective transition temperatures. A negative sign of the measured thermo-power (S) in Gd-123 indicates that electron-like carriers dominate the heat transport in the pristine sample; whereas a sign reversal in S, as a consequence of the change of dominant carrier upon doping, is observed. Specific heat ( CP) measurements show a jump around the transition temperature ( TC) for the pristine sample, however, such a jump in CP is strongly suppressed for the doped samples.
AB - In the present paper, we present thermal and electrical transport properties of pristine and co-doped samples of high temperature superconductors Gd0.95Pr0.05Ba2Cu2.94M 0.06O7-δ. It is found that all the samples, except the Mn co-doped sample, show metallic behavior in the normal state. It is observed that the upper critical field has a correlation with the substituent site of the co-dopant. Thermal conductivity κ(T) of all the samples, except the one with Zn co-doping, exhibits a hump like structure around their respective transition temperatures. A negative sign of the measured thermo-power (S) in Gd-123 indicates that electron-like carriers dominate the heat transport in the pristine sample; whereas a sign reversal in S, as a consequence of the change of dominant carrier upon doping, is observed. Specific heat ( CP) measurements show a jump around the transition temperature ( TC) for the pristine sample, however, such a jump in CP is strongly suppressed for the doped samples.
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U2 - 10.1016/j.ssc.2011.05.029
DO - 10.1016/j.ssc.2011.05.029
M3 - Article
AN - SCOPUS:79960730850
SN - 0038-1098
VL - 151
SP - 1117
EP - 1121
JO - Solid State Communications
JF - Solid State Communications
IS - 17
ER -