研究了Sn,Te掺杂对CrSb2热电性能的不同影响.结果表明,Sn、Te掺杂引起的晶格畸变使电子浓度提高,Te替代Sb是N-型掺杂,而Sn替代Sb是p-型掺杂.由于补偿效应,CrSb1.99Sn0.01的电子浓度小于CrSb1.99Te0.01的电子浓度,导致Sn掺杂使CrSb2的电阻率和热电势「S」降低的幅度较小.掺杂后声子杂质(Sn、Te)散射增强,CrSb1.99Sn0.01和CrSb1.99Te0.01的热导率都明显减小,而Te的原子量比Sn的大,散射作用更强,热导率减小的幅度更加明显.因此,Te掺杂改善了CrSb2的热电性能,而Sn掺杂没有改善其性能.此外,由于Sn和Te的d轨道填满了电子而没有磁性,掺杂后样品的Neel温度没有明显改变.
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