{"title":"Electronic Thermoelectric Properties of MgXY2Z2 Double Half-Heusler Alloys (X = Zr/Hf, Y = Pd/Pt, Z = Bi/Sb)","authors":"A. N. Filanovich, A. V. Lukoyanov, A. A. Povzner","doi":"10.1134/S0021364025600016","DOIUrl":null,"url":null,"abstract":"<p>Double half-Heusler alloys represent a novel promising class of materials for applications, e.g., in thermoelectric energy converters. In this work, the electronic thermoelectric properties of five MgXY<sub>2</sub>Z<sub>2</sub> (X = Zr/Hf, Y = Pd/Pt, Z = Bi/Sb) compounds of this alloy class with the previously predicted low lattice thermal conductivity have been investigated for the first time. It has been shown that the Seebeck coefficients of MgHfPd<sub>2</sub>Sb<sub>2</sub> and MgTiPd<sub>2</sub>Sb<sub>2</sub> are among the highest in double half-Heusler alloys. The dependences of the Seebeck coefficient and power factor on the chemical potential at different temperatures and carrier densities have been analyzed, and the relationship between these dependences and the peculiarities of the electronic structure of the considered compounds has been revealed.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 4","pages":"301 - 305"},"PeriodicalIF":1.4000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"JETP Letters","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S0021364025600016","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Double half-Heusler alloys represent a novel promising class of materials for applications, e.g., in thermoelectric energy converters. In this work, the electronic thermoelectric properties of five MgXY2Z2 (X = Zr/Hf, Y = Pd/Pt, Z = Bi/Sb) compounds of this alloy class with the previously predicted low lattice thermal conductivity have been investigated for the first time. It has been shown that the Seebeck coefficients of MgHfPd2Sb2 and MgTiPd2Sb2 are among the highest in double half-Heusler alloys. The dependences of the Seebeck coefficient and power factor on the chemical potential at different temperatures and carrier densities have been analyzed, and the relationship between these dependences and the peculiarities of the electronic structure of the considered compounds has been revealed.
MgXY2Z2双半heusler合金(X = Zr/Hf, Y = Pd/Pt, Z = Bi/Sb)的电子热电性能
双半赫斯勒合金代表了一种新的有前途的应用材料,例如热电能量转换器。本文首次研究了五种具有低晶格热导率的MgXY2Z2 (X = Zr/Hf, Y = Pd/Pt, Z = Bi/Sb)合金类化合物的电子热电性能。结果表明,MgHfPd2Sb2和MgTiPd2Sb2是双半heusler合金中塞贝克系数最高的合金。分析了塞贝克系数和功率因数在不同温度和载流子密度下对化学势的依赖关系,揭示了这些依赖关系与所考虑化合物的电子结构特性之间的关系。
期刊介绍:
All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.