Magnetic properties of weak itinerant electron ferromagnet CrAlGe

International Workshop on Itinerant-Electron Magnetism

Yoshinaga, Soshi^1 ; Mitsui, Yoshifuru^1 ; Umetsu, Rie Y.^2 ; Uwatoko, Yoshiya^3 ; Koyama, Keiichi^1

Graduate School of Science and Engineering, Kagoshima University, Kagoshima

890-0065, Japan^1

Institute for Materials Research, Tohoku University, Sendai

980-8577, Japan^2

Institute for Solid State Physics, University of Tokyo, Kashiwa

277-8581, Japan^3

关键词: Ambient pressures;    Ferromagnets;    High pressure;    Itinerant electrons;    Type structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/868/1/012018/pdf
DOI  :  10.1088/1742-6596/868/1/012018

来源: IOP

【 摘 要 】

Magnetic properties for CrAlGe with an orthorhombic TiSi2-type structure were investigated under ambient pressure and hydrostatic pressure. CrAlGe is ferromagnetic at the temperature below Curie temperature TCof 80 K and has the spontaneous magnetic moment psof 0.41 μB/f.u. at 5 K and the effective moment peffof 1.89 μB/f.u. under ambient pressure. For the temperature T below 30 K, the decrease in ps(T)2/ps(5K)2was proportional to T2. However, the decrease in ps(T)2/ps(5K)2was proportional to T4/3for 30 K C. The ratio peff/pswas consistent with the theoretical curve of the generalized Rhodes-Wohlfarth plot (Takahashi plot). Obtained results suggest that CrAlGe is a weak itinerant electron ferromagnet. By applying a high pressure of 1 GPa, TCdecreased by approximately 10 K.