Abstract
The magnetization of Mn-intercalated layered MnNb3S6 single crystal has been systematically investigated. The angle-dependent magnetization (, , and ) displays that the magnetization of MnNb3S6 with is much stronger than that with H//c, but no magnetic anisotropy within the ab-plane. In addition, a field-induced magnetic phase transition is found when . The investigation of the critical behavior gives the critical exponents , , and with K, which belong to the universality class of three-dimensional Heisenberg model. The critical behavior and exponents indicate that the magnetic coupling in MnNb3S6 is of an isotropic short-range type. Based on universality scaling, the H − T phase diagram with is constructed. The magnetic behaviors and phase diagram of MnNb3S6 are analogous to those of CrNb3S6 which exhibits a chiral magnetic soliton lattice.
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