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
N1 - Funding Information:
One of the authors (T.C.) is grateful to UGC-DAE Consortium for Scientific Research , Indore for financial support under the scheme CSR Indore/ PROJ/SANC/13/2006/1429 . One of the authors (B.G.) is grateful to Council of Scientific and Industrial Research , New Delhi (CSIR) for financial help under scheme No. CSIR-80(0056)/05/EMR-II. The authors are thankful to Mr. Sachin Kumar, UGC-DAE CSR, Indore for providing the necessary help in magneto-resistance measurements. The experimental work is supported by the National Science Council of Taiwan under contract No. NSC-97-2628-M-259-001-MY3 (Y.K.K).
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.
UR - https://www.scopus.com/pages/publications/79960730850
UR - https://www.scopus.com/pages/publications/79960730850#tab=citedBy
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 -