논문 해외 국제전문학술지(SCI급) CORRELATION BETWEEN THE MAGNETIC AND THERMOELECTRIC PROPERTIES IN MG2-XMNXSI
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2017-01
- 저자명 오민욱
- 학술지명 JOURNAL OF ALLOYS AND COMPOUNDS
- 발행처명 ELSEVIER SCIENCE SA
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 5
홈페이지논문 초록 (Abstract)
Single crystals of Mg2-xMnxSi (x = 0, 0.1, 0.2, 0.3, and 0.4) were prepared using a vertical Bridgman method. The formation of desire d materials was confirmed using single-crystal and powder X-ray diffraction. The thermoelectric and magnetic properties were investigated for various Mn contents in the temperature rang e between 2 and 300 K and in magneticfields up to 70 kOe. For various x values, Mg2-xMnxSi with x = 0.2 possesses the highest figure of meri t. The experimental results revealed that the Substitutional Mn ato ms exhibit mixed valences of +3 (majority) and +2, giving rise to drama tic changes of carrier density and magnetic interaction. At the same tim e, the Seebeck coefficient and magnetic susceptibility show a sudde n change at the same temperature. These results imply that the thermoele ctric properties are correlated with the magnetic properties in th e Mg2-xMnxSi crystals. (C) 2016 Elsevier B.V. All rights reser ved.