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Half-metallic ferromagnetism and thermoelectric properties of vanadium doped Hf1−xVxO2 alloys (x = 0, 0.25, 0.50, 0.75) by first principle perspective
Physics Letters A ( IF 2.3 ) Pub Date : 2021-07-09 , DOI: 10.1016/j.physleta.2021.127559
Ramesh Sharma 1 , Sajad Ahmad Dar 2 , Vipul Srivastava 3
Affiliation  

In this work, we have reported the first-principles calculations based on functional theory density on the structural, electronic, magnetic, bonding nature and thermoelectric properties of Hf1-xVxO2 alloys (x = 0, 0.25, 0.50, 0.75). For all the materials, the equilibrium structural parameters like that of lattice constant, bulk modulus and first pressure derivative of bulk modulus have been computed. The band profile and the density of states results demonstrate half-metallic nature for Hf1-xVxO2 alloys (x = 0.25, 0.50, 0.75). The calculated total magnetic moment was 1.0 μB/cell, 2.0 μB/cell, and 3.0 μB/cell, and the partial moment of V or local contribution is 1.08 μB, 1.85 μB, and 2.73 μB, respectively for Hf1-xVxO2 alloys (x = 0.25, 0.50, 0.75). The transport properties such as Seebeck coefficient, thermo power and thermal conductivity are found to have a great variation with V concentration. These alloys may find suitable applications in spintronic materials and in high temperature thermoelectric devices.



中文翻译:

钒掺杂的 Hf 1−x V x O 2合金 (x = 0, 0.25, 0.50, 0.75) 的半金属铁磁性和热电性能,从第一性原理的角度来看

在这项工作中,我们报告了基于泛函理论密度对 Hf 1-x V x O 2合金 (x = 0, 0.25, 0.50, 0.75 )。计算了所有材料的平衡结构参数,如晶格常数、体积模量和体积模量的一阶压力导数。能带轮廓和态密度结果证明了 Hf 1-x V x O 2 的半金属性质合金(x = 0.25、0.50、0.75)。计算出的总磁矩为1.0 μB/cell、2.0 μB/cell和3.0 μB/cell,对于Hf 1-x V x,V或局部贡献的偏矩分别为1.08 μB、1.85 μB和2.73 μB O 2合金(x = 0.25、0.50、0.75)。发现塞贝克系数、热功率和热导率等输运性质随 V 浓度变化很大。这些合金可以在自旋电子材料和高温热电器件中找到合适的应用。

更新日期:2021-07-09
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