Thermoelectric Properties of Solution Grown β-FeSi2 Single Crystals

Autor:	Hirokazu Suzuki, Isao Kikuma, Haruhiko Udono
Rok vydání:	2006
Předmět:	Materials science Mechanical Engineering Condensed Matter Physics Solvent Crystallography Temperature gradient Mechanics of Materials Electrical resistivity and conductivity Seebeck coefficient Thermoelectric effect General Materials Science Longitudinal axis Single crystal Order of magnitude
Zdroj:	MATERIALS TRANSACTIONS. 47:1428-1431
ISSN:	1347-5320 1345-9678
DOI:	10.2320/matertrans.47.1428
Popis:	We have measured the Seebeck coefficient of single crystalline β-FeSi 2 grown by a temperature gradient solution growth (TGSG) method using Ga solvent. Rectangular-like β-FeSi 2 plates with the size of (3-6) x (1-2) x 0.3 mm 3 . where the longitudinal axis was [011], were prepared from the grown ingots. Typical resistivity and hole concentration of the crystals were 4 x 10 -4 Qm and 2 x 10 25 m -3 at room temperature (RT), respectively. The Seebeck coefficient measured along the [011] direction was approximately 350μV/K at RT and showed the maximum value of 500 μV/K between 20 and 25 K. We also found that the solution grown single crystals had large power factors below RT. The value was 3.4 x 10 -4 Wm -1 K -2 at RT. which was about three times larger than that of sintered poly-crystals and CVT-grown single crystals. The maximum power factor was 4.5 x 10 -4 Wm -1 K -7 around 150 K. The value was more than one order of magnitude larger than reported values.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3ee2d34ff9437e4559c88c270b4330d2 https://doi.org/10.2320/matertrans.47.1428 Zobrazit plný text záznamu