期刊
JOURNAL OF APPLIED PHYSICS
卷 127, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5141949
关键词
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资金
- JSPS KAKENHI [16H02333, 18KK0111, 18K13789, 19H05616]
- JST-CREST [JPMJCR18J1]
- Grants-in-Aid for Scientific Research [18K13789, 18KK0111] Funding Source: KAKEN
Fe2TiSi has been expected to be one of the high-performance thermoelectric full-Heusler alloys. Here, we experimentally clarify the room-temperature Seebeck coefficient (S) and thermal conductivity (.) for the Fe2TiSi films. Using a molecular beam epitaxy technique, we demonstrate the high degree of L21-ordering and the homogeneous single-phase structure in the Fe2TiSi films. We find that the intrinsic conduction carriers of the Fe2TiSi films are holes and impurity-induced carrier scattering is indicated, derived from weak magnetic moments due to the presence of D03-type (Fe, Ti) structural disorder in the Fe2TiSi film. From reliable measurements for thin films, the values of S and. are estimated to be 101 mu V/K and 5.6 W/(m K), respectively, at room temperature. This study will open a new way for full-Heusler alloy thermoelectric materials other than those in Fe2VAl systems.
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