Transport properties of Heusler Compound Mn3Si under high pressure

27th International Conference on Low Temperature Physics

Takaesu, Y.^1 ; Uchima, K.^1 ; Nakamura, S.^2 ; Yogi, M.^3 ; Niki, H.^3 ; Hedo, M.^3 ; Nakama, T.^3 ; Tomiyoshi, S.^4

General Education, Okinawa Christian Junior College, Nishihara, Okinawa

903-0204, Japan^1

Graduate School of Engineering and Science, University of the Ryukyus, Nishihara

903-0213, Japan^2

Faculty of Science, University of the Ryukyus, Nishihara, Okinawa

903-0213, Japan^3

Faculty of Engineering, Ehime University, Matsuyama

790-8577, Japan^4

关键词: Heusler compound;    High pressure;    Pressure dependence;    Pressure-induced phase transition;    Residual resistivity;    Single-crystalline;    Temperature range;    Temperature variation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/4/042033/pdf
DOI  :  10.1088/1742-6596/568/4/042033

来源: IOP

【 摘 要 】

The electrical resistivity ρ and the thermopower S of the single crystalline sample of the Heusler compound Mn3Si have been measured in the temperature range between 2 and 300 K under high pressures up to 2.2 GPa. The temperature variations of ρ and S indicate the characteristic features at the Néel temperature TN. An additional anomaly in S(T), related to the 3Q satellites in SDW, is observed at P > 1 GPa, and it disappears at P > 1 GPa. The Néel temperature, obtained from ρ(T) and S(T) curves, increases with increasing pressure. The pressure dependences of the residual resistivity and the thermopower at T 2 K show the discontinuous changes at P ≈ 1 GPa, indicating a pressure induced phase transition.