[8p-E203-1~15] 9.4 Thermoelectric conversion

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)

[8p-E203-5] Magneto-thermoelectric Response and Electronic Structure in Composition-Gradient Heusler-type Fe₂VAl Thin Films

〇(M2)Taketo Nakashima^1,2, Hidetoshi Miyazaki¹, Weinan Zhou², Yuya Sakuraba² (1.Nitech, 2.NIMS)

Keywords:

Thermoelectric materials,Density of States,compositionally graded thin films

In thermoelectric Fe_2.2V_0.8Al-based full-Heusler alloys, the magnetothermoelectric response of epitaxially strained thin films remains unexplored. In this study, we fabricated compositionally graded thin films of the Fe_2.2V_0.8Al parent phase and evaluated the Seebeck coefficient under an applied magnetic field. As a result, unlike bulk materials, an enhancement in the absolute value of the Seebeck coefficient induced by the magnetic field was observed. This is attributed to the contribution of anisotropic magnetothermoelectric power arising from structural anisotropy. Our findings present a novel material design guideline utilizing lattice strain.