Magnetism in α-R2S3 (R = Pr and Nd) single crystals

27th International Conference on Low Temperature Physics

Ebisu, S.^1 ; Nagata, T.^1 ; Fuji, K.^1 ; Shibayama, Y.^1

College of Design and Manufacturing Technology, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido

050-8585, Japan^1

关键词: Inflection points;    Isostructural;    Kramers doublet;    Orthorhombic crystal structures;    Paramagnetic contribution;    Schottky;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/4/042003/pdf
DOI  :  10.1088/1742-6596/568/4/042003

来源: IOP

【 摘 要 】

Magnetic susceptibility, χ, and specific heat, C, of the isostructural rare-earth sesquisulfides α-R2S3(R Pr and Nd) have been investigated on single crystals. The χ(T) of α-Nd2S3shows a broad peak around 3.5 K when a magnetic field of 100 Oe is applied along the b-axis of the orthorhombic crystal structure. A Neel temperature TNabove 2 K has been determined as 2.75 K by an inflection point in the χ(T) and a sharp peak in the C(T). Furthermore, the C(T) indicates another peak at around 0.65 K. The ground states of Nd3+on both the two Nd sites are concluded as Kramers doublets. The χ(T) of α-Pr2S3shows a broad peak around 3.8 K only in the case of H//b. The χ for H⊥b is almost constant below 5 K, which suggests existence of Van Vleck paramagnetic contribution. An inflection point in the χ(T) (H//b) exists at TN2.95 K which is consistent with the temperature of a sharp peak observed in the C(T). A Schottky-type anomaly around 8 K in the C(T) has also been found. The ground states of Pr3+on two Pr sites are considered as a pseudo-doublet and a singlet.