Title :
Large thermopower in a layered oxide NaCo2O4
Author :
Terasaki, I. ; Sasago, Y. ; Uchinokura, K.
Author_Institution :
Dept. of Appl. Phys., Waseda Univ., Tokyo, Japan
Abstract :
The transition-metal oxide NaCo2O4 is a layered oxide in which CoO2 and Na alternately stack along the c axis. Recently we have found that this compound shows large thermopower with low resistivity which are comparable to those of Bi2Te3. The negative transverse magnetoresistance and the strongly temperature-dependent Hall coefficient suggest that electron correlation dominates the conduction mechanism in NaCo2 O4
Keywords :
Hall effect; magnetoresistance; sodium compounds; strongly correlated electron systems; thermoelectric power; Hall coefficient; NaCo2O4; electron correlation; layered oxide; negative transverse magnetoresistance; resistivity; thermopower; Charge carrier density; Conducting materials; Conductivity; Crystals; Ferroelectric materials; Magnetic materials; Physics; Superconducting materials; Tellurium; Thermoelectricity;
Conference_Titel :
Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on
Conference_Location :
Nagoya
Print_ISBN :
0-7803-4907-5
DOI :
10.1109/ICT.1998.740442