Tricritical point and phase diagram based on critical scaling in the monoaxial chiral helimagnet Cr1/3NbS2

Article

关键词: WEAK FERROMAGNETISM;    CRITICAL EXPONENTS;   

DOI  :  10.1103/PhysRevB.96.094439

来源: SCIE

【 摘 要 】

In this paper, the magnetism of the single-crystal Cr1/3NbS2, which exhibits a chiral magnetic soliton lattice (CSL) state, is investigated. The magnetization displays strong magnetic anisotropy when the field is applied perpendicularly and parallel to the c axis in the low-field region (H < H-S,HS is the saturation field). The critical exponents of Cr1/3NbS2 are obtained as beta = 0.370(4), gamma = 1.380(2), and delta = 4.853(6), which are close to the theoretical prediction of the three-dimensional Heisenberg model. Based on the scaling equation and the critical exponents, the H-T phase diagram in the vicinity of the phase transition is constructed where two critical points are determined. One is a tricritical point which locates at the intersection across the CSL, the forced ferromagnetic, and the paramagnetic (PM) states. The other one is a critical point situated at the boundaries across the CSL, the helimagnetic, and the PM states.

【 授权许可】

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