Dai Yuhui, Liu Wei, Wang Yamei, Fan Jiyu, Pi Li, Zhang Lei, Zhang Yuheng
Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People's Republic of China. University of Science and Technology of China, Hefei 230026, People's Republic of China.
J Phys Condens Matter. 2019 May 15;31(19):195803. doi: 10.1088/1361-648X/aafebc. Epub 2019 Jan 15.
The magnetization of Mn-intercalated layered MnNbS single crystal has been systematically investigated. The angle-dependent magnetization ([Formula: see text], [Formula: see text], and [Formula: see text]) displays that the magnetization of MnNbS with [Formula: see text] 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 [Formula: see text]. The investigation of the critical behavior gives the critical exponents [Formula: see text], [Formula: see text], and [Formula: see text] with [Formula: see text] K, which belong to the universality class of three-dimensional Heisenberg model. The critical behavior and exponents indicate that the magnetic coupling in MnNbS is of an isotropic short-range type. Based on universality scaling, the H - T phase diagram with [Formula: see text] is constructed. The magnetic behaviors and phase diagram of MnNbS are analogous to those of CrNbS which exhibits a chiral magnetic soliton lattice.
对插层锰的层状MnNbS单晶的磁化进行了系统研究。角度相关的磁化强度（[公式：见正文]、[公式：见正文]和[公式：见正文]）表明，[公式：见正文]时MnNbS的磁化强度比H//c时强得多，但在ab平面内没有磁各向异性。此外，当[公式：见正文]时发现了场致磁相变。对临界行为的研究给出了临界指数[公式：见正文]、[公式：见正文]和[公式：见正文]，其中[公式：见正文]K，它们属于三维海森堡模型的普适类。临界行为和指数表明MnNbS中的磁耦合是各向同性短程类型。基于普适标度，构建了[公式：见正文]时的H - T相图。MnNbS的磁行为和相图与表现出手性磁孤子晶格的CrNbS类似。
