|
|
|
| The Different Effect of Sn and Te Substitution for Sb on Thermoelectric Properties of CrSb2 |
| LI Haijin, ZHANG Qing, LIU Yi, SUN Wenbin |
| School of Mathematics and Physics, Anhui University of Technology, Ma’anshan 243002 |
|
Cite this article:
LI Haijin ZHANG Qing LIU Yi SUN Wenbin. The Different Effect of Sn and Te Substitution for Sb on Thermoelectric Properties of CrSb2. Chin J Mater Res, 2010, 24(4): 429-433.
|
|
|
Abstract The different effect of Sn and Te substitution for Sb on thermoelectric properties of CrSb2 was investigated. The results show that the effect of lattice distortion after doping leads to the increase in the electron concentration of CrSb2. The substitution of Sn and Te for Sb can be regarded as p–doping and n–doping, respectively, the electron concentration of CrSb1.99Sn0.01 is smaller than that of CrSb1.99Te0.01 due to the compensation effect, leading to lesser decrease of resistivity and the absolute value of thermopower |S| for Sn doping than that of Te doping. Thermal conductivity of CrSb1.99Sn0.01 and CrSb1.99Te0.01 decreased after doping, which can be attributed to the enhancement of the phonon
scattering by impurity (Sn and Te, respectively) atoms, the atomic mass of Te is greater than that of Sn, the phonon scattering by impurity atoms is stronger, resulting in the more decrease of thermal conductivity for Te doping. As a result, the thermoelectric properties of CrSb2 was improved by Te doping, however, Sn doping did not meet the purpose of improving the performance of CrSb2. In addition, the Neel temperature does not change much after doping, which can be attributable to non-magnetic feature with full 3d orbits for Sn and Te.
|
|
Received: 15 April 2010
|
|
|
| Fund: Supported by National Nature Science Foundation for Youths of China No. 50701043. |
| 参考文献：
[1] F. J. DiSalvo, Thermoelectric Cooling and Power Generation, Science, 285, 703-706(1999)
[2] G. S. Nolas, J. Sharp，and H. J. Goldsmid, Thermoelectrics: Basic Principles and New Materials Developments, 1stedition, (Germany, Springer-Verlag Berlin Heidelberg. 2001) p.1-14.
[3] H. Holseth, A. Kjekshus,Compounds with the Marcasite Type Crystal Structure. II. On the Crystal Structures of the Binary Pnictides,Acta Chemica Scandinavica, 22,3284-3292(1968)
[4] Y. Takahashi, T. Harada, T. Kanomata, K. Koyama, H. Yoshida, T. Kaneko, M. Motokawa, M. Kataoka,Magnetoresistance effect of pseudobinary compounds
Cr1-xRuxSb2,Journal of Alloys and Compounds, 459,78-82(2008)
[5] T. Harada, T. Kanomata, Y. Takahashi, O. Nashima, H. Yoshida, T. Kaneko,Structural and electrical properties of Cr1-xRuxSb2,Journal of Alloys and Compounds, 383,200-204(2004)
[6] K. Adachi, K. Sato, M. Matsuura, Magnetic Properties of CrSb2, Journal of the Physical Society of Japan, 26,906-910(1969)
[7] John B. Goodenough, Energy Bands in TX2 Compounds with Pyrite, Marcasite, and Arsenopyrite Structures, Jounal of Solid State Chemistry, 5,144-152(1972)
[8] H. Holseth, A. Kjekshus, Compounds with the Marcasite Type Crystal Structure: Ⅵ: Neutron Diffraction Studies of CrSb2 and FeSb2, Acta Chemica Scandinavica, 24, 3309-3316(1970)
[9] 高敏,张景韶,[英]D. M. ROWE, 温差电转换及其应用, 第一版 (北京, 兵器工业出版社, 1996)
[10] 阎守胜,固体物理基础,第三版(北京,北京大学出版社,2002)
[11] K. Berggold, M. Kriener, C. Zobel, A. Reichl, M. Reuther, R. Müller, A. Freimuth, and T. Lorenz, Thermal conductivity, thermopower, and figure of merit of La1?xSrxCoO3, Physical Review B, 72,155116(2005)
|
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
