Effects of substituting La(3+), Y(3+) and Ce(4+) for Ca(2+) on the high temperature transport and thermoelectric properties of CaMnO(3)

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	Effects of substituting La(3+), Y(3+) and Ce(4+) for Ca(2+) on the high temperature transport and thermoelectric properties of CaMnO(3)
	Y. Wang; Y. Sui; X. J. Wang; W. H. Su
	2009
发表期刊	Journal of Physics D-Applied Physics
ISSN	0022-3727
卷号	42 期号:5
摘要	We report the high temperature transport and thermoelectric properties of Ca(1-x)R(x)MnO(3) (R = La, Y and Ce) perovskites in the electron-doped range. The substitution of different valence ions has a similar effect on the thermoelectric properties of this system. Resistivity and thermopower change regularly as the enhancement of doping level; they are both determined mainly by electron concentration. Thermal conductivity is dependent mainly on the weight of R ions, and it decreases monotonically with increasing doping content. The optimal electron concentration is around 0.1-0.12 for thermoelectric performance; in this range the ZT value of Ca(0.9)La(0.1)MnO(3) exceeds 0.12 at 1000 K, exhibiting a good high temperature thermoelectric applied potential. Besides, the hopping nature of the charge carriers is well explained in the framework of polaron theory. The high temperature thermopower values which are inconsistent with nominal Mn(3+) ion t(2g)(3)e(g)(1) configuration are also discussed.
部门归属	[wang, yang; sui, yu; wang, xianjie; su, wenhui] harbin inst technol, dept phys, ctr condensed matter sci & technol, harbin 150001, peoples r china. [sui, yu] acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;sui, y (reprint author), harbin inst technol, dept phys, ctr condensed matter sci & technol, harbin 150001, peoples r china;suiyu@hit.edu.cn
关键词	Metal-insulator-transition Performance Ca3co4o9 System Magnetoresistance Fabrication Antimonides
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32398
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Wang,Y. Sui,X. J. Wang,et al. Effects of substituting La(3+), Y(3+) and Ce(4+) for Ca(2+) on the high temperature transport and thermoelectric properties of CaMnO(3)[J]. Journal of Physics D-Applied Physics,2009,42(5).
APA	Y. Wang,Y. Sui,X. J. Wang,&W. H. Su.(2009).Effects of substituting La(3+), Y(3+) and Ce(4+) for Ca(2+) on the high temperature transport and thermoelectric properties of CaMnO(3).Journal of Physics D-Applied Physics,42(5).
MLA	Y. Wang,et al."Effects of substituting La(3+), Y(3+) and Ce(4+) for Ca(2+) on the high temperature transport and thermoelectric properties of CaMnO(3)".Journal of Physics D-Applied Physics 42.5(2009).