TY - JOUR
T1 - Thermoelectric power studies on the Sm substituted BPSCCO (2223) superconductors
AU - Nanda Kishore, K.
AU - Satyavathi, S.
AU - Muralidhar, M.
AU - Pena, O.
AU - Hari Babu, V.
N1 - Funding Information:
The authors would like to thank the Department of Science and Technology, Govt. of India, New Delhi for providing financial assistance. One of the authors (KNK) thanks CSIR for awarding a Research Associateship. The authors also thank R.G. Sharma, NPL, New Delhi for useful discussions.
PY - 1995/10/1
Y1 - 1995/10/1
N2 - Measurements of the thermoelectric power have been carried out on Bi1.7Pb0.3Sr2Ca2-xSmxCu3Oy (0.0≤x ≤2.0) specimens between 77 K and 300 K. The hole-carrier concentrations were calculated from the room-temperature thermopower values and it was found to decrease with increasing Sm concentration. The temperature variation of the thermopower is similar for all the samples and has indicated a two-band conduction. The results also have suggested an increased interaction of electrons and holes with phonons at low temperatures. The thermopower has attained a maximum value just above the transition temperature and thereafter decreased with increasing temperature. The thermopower value has also undergone a sign change at a temperature which varied systematically with Sm concentration. The results are presented and discussed.
AB - Measurements of the thermoelectric power have been carried out on Bi1.7Pb0.3Sr2Ca2-xSmxCu3Oy (0.0≤x ≤2.0) specimens between 77 K and 300 K. The hole-carrier concentrations were calculated from the room-temperature thermopower values and it was found to decrease with increasing Sm concentration. The temperature variation of the thermopower is similar for all the samples and has indicated a two-band conduction. The results also have suggested an increased interaction of electrons and holes with phonons at low temperatures. The thermopower has attained a maximum value just above the transition temperature and thereafter decreased with increasing temperature. The thermopower value has also undergone a sign change at a temperature which varied systematically with Sm concentration. The results are presented and discussed.
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U2 - 10.1016/0921-4534(95)00284-7
DO - 10.1016/0921-4534(95)00284-7
M3 - Article
AN - SCOPUS:0029393244
VL - 252
SP - 49
EP - 53
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -