Multiple metamagnetic transitions induced by high magnetic field in DyBi

The rare-earth monopnictide compounds have recently received considerable attention in condensed matter physics because of their correlation between magnetism, crystallographic structure, and transport. Here, we re-port experimental observations of high-magnetic-field-induced multiple metamagnetic transitions and magnetic structures in DyBi single crystals. The external field up to 32 T is applied in three distinct crystallographic directions as H//[001], H//[011], and H//[111], which reveals anisotropic magnetism as well as multiple metamagnetic transitions. Two field-induced magnetic phase transitions at 3.7 T and 4.9 T along H//[001], two at 3.8 T and 24 T along H//[011], and one at 3.8 T along H//[111] are identified. In order to unveil the nature of magnetic interaction in DyBi, the critical behavior analysis for H//[001], a direction with typical magnetism and transitions, is performed. The yielded critical exponents beta = 0.234(8), gamma = 0.904(3), and delta = 5.03(2) agree well with the theoretical prediction of a tricritical mean-field model, indicating a field-induced tricritical phenomenon in this system. Comprehensive magnetic phase diagrams for H//[001], H//[011], and H//[111] are constructed based on detailed magnetization measurement and scaling, which reveal multiple phases such as NiO-type antiferromagnetic (AFM), HoP-type AFM, forced ferromagnetic (FFM), and paramagnetic (PM) phases. Two tricritical points (TCPs) are determined at the intersections of the AFM, FFM, and PM phases, with TCP = (8.6 K, 85 kOe) for H//[001] and (16.8 K, 243 kOe) for H//[011]. The recognition of multiple phases suggests delicate and complex competition and balance between variable couplings in this system.

Automated summary

The rare-earth monopnictide compounds have attracted considerable attention in condensed matter physics due to their correlation between magnetism, crystallographic structure, and transport. This study reports experimental observations of multiple metamagnetic transitions and magnetic structures in DyBi single crystals induced by high magnetic fields. The results reveal anisotropic magnetism and the existence of multiple phases, suggesting complex competition and balance in the system. The critical behavior analysis and comprehensive magnetic phase diagrams provide insights into the nature of magnetic interaction and the tricritical phenomenon in this system.