Thermoelectric Response Driven by Spin-State Transition in La(1-x)Ce(x)CoO(3) Perovskites

IMR OpenIR

	Thermoelectric Response Driven by Spin-State Transition in La(1-x)Ce(x)CoO(3) Perovskites
	Y. Wang; Y. Sui; X. J. Wang; W. H. Su; W. W. Cao; X. Y. Liu
	2010
发表期刊	Acs Applied Materials & Interfaces
ISSN	1944-8244
卷号	2 期号:8 页码:2213-2217
摘要	An unusual thermoelectric response was observed in n-type perovskite oxide La(1-x)Ce(x)CoO(3). Combining transport and magnetic measurements, we found that the thermoelectric response is driven by the spin-state transition of Co(3+). This transition destroys the spin blockade effect and induces an abrupt decrease of resistivity as well as an insulator metal transition. In contrast to the resistivity change, changes in thermopower and thermal conductivity are moderate. Consequently, a peak of figure of the merit ZT is present in a narrow temperature range. The room-temperature ZT approximate to 0.018 of La(0.94)Ce(0.06)CoO(3) is comparable to that of p-type Na(x)CoO(2). These observations can be helpful for the search and design of new thermoelectric materials.
部门归属	[wang, yang; sui, yu; wang, xianjie; su, wenhui; cao, wenwu] harbin inst technol, ccmst, dept phys, harbin 150001, peoples r china. [wang, yang] nanyang technol univ, div phys & appl phys, sch phys & math sci, singapore 637371, singapore. [sui, yu] acad sinica, int ctr mat phys, shenyang 110015, peoples r china. [cao, wenwu] penn state univ, mat res inst, university pk, pa 16802 usa. [liu, xiaoyang] jilin univ, state key lab inorgan synth & preparat chem, coll chem, changchun 130012, peoples r china.;sui, y (reprint author), harbin inst technol, ccmst, dept phys, harbin 150001, peoples r china;suiyu@hit.edu.cn
关键词	Thermoelectric Electron-doping Spin-state Transition Spin Blockade Configuration Entropy Cobalt Oxides Rcoo3 r Lacoo3 Fabrication Power Eu Sm Nd
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31540
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. Thermoelectric Response Driven by Spin-State Transition in La(1-x)Ce(x)CoO(3) Perovskites[J]. Acs Applied Materials & Interfaces,2010,2(8):2213-2217.
APA	Y. Wang,Y. Sui,X. J. Wang,W. H. Su,W. W. Cao,&X. Y. Liu.(2010).Thermoelectric Response Driven by Spin-State Transition in La(1-x)Ce(x)CoO(3) Perovskites.Acs Applied Materials & Interfaces,2(8),2213-2217.
MLA	Y. Wang,et al."Thermoelectric Response Driven by Spin-State Transition in La(1-x)Ce(x)CoO(3) Perovskites".Acs Applied Materials & Interfaces 2.8(2010):2213-2217.