Thermoelectric properties of polygrained icosahedral Al71-xGaxPd20Mn9 (x=0,2,3,4) quasicrystals
Thermoelectric properties of polygrained icosahedral Al71-xGaxPd20Mn9 (x=0,2,3,4) quasicrystals
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DOI：
10.1063/1.2990772
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发表时间：
2008-10-01
影响因子：
3.2
通讯作者：
Kimura, K.
中科院分区：
文献类型：
--
作者：
Takagiwa, Y.;Kamimura, T.;Kimura, K.
用Ga取代二十面体Al-Pd-Mn准晶体中的Al获得了Al(71-x)Ga(x)Pd(20)Mn(9) （x=0,2,3,4）准晶体，并根据“弱键刚性重团簇”（WBRHCs）的指导原则测量了其电性和热输运性质。电导率和塞贝克系数变化不大，但除x=4外，导热系数随Ga浓度的增加而有效降低。虽然热电性质不服从WBRHCs，但Al(71)Pd(20)Mn(9)准晶的无因次优值从0.18增加到0.26，增加了1.4倍。(c) 2008年美国物理研究所。
The electrical and thermal transport properties of quaternary icosahedral Al(71-x)Ga(x)Pd(20)Mn(9) (x=0,2,3,4) quasicrystals, obtained by replacing Al in icosahedral Al-Pd-Mn quasicrystal with Ga, have been measured in accordance with the guiding principle of "weakly bonded rigid heavy clusters" (WBRHCs). While the electrical conductivity and Seebeck coefficient were not dramatically changed, the thermal conductivity effectively decreased with increasing Ga concentration except for the sample with x=4. Although the thermoelectric properties do not obey the WBRHCs, the dimensionless figure of merit increased by a factor of 1.4 from 0.18 for Al(71)Pd(20)Mn(9) to 0.26 for Al(68)Ga(3)Pd(20)Mn(9) quasicrystal. (c) 2008 American Institute of Physics.