Journal of Experimental and Theoretical Physics ( IF 1.1 ) Pub Date : 2021-05-30 , DOI: 10.1134/s106377612104004x V. A. Chizhikov
Abstract
The magnetic phases of cubic chiral ferromagnets with the Dzyaloshinskii–Moriya interaction (MnSi, Cu2OSeO3) are studied in terms of microscopic and phenomenological approaches. The interaction of the magnetic moments of atoms with a local crystal field is shown to cause a cubic anisotropic term \(M_{x}^{4}\) + \(M_{y}^{4}\) + \(M_{z}^{4}\) (M is the magnetization field) in the Landau–Lifshitz energy. This term is responsible for the existence of the helical phase at a near-zero magnetic field and can contribute to the stability of the magnetic A phase in higher fields. The A phase is simulated at various magnetic fields. When a magnetic field is turned on, the helices in the helical phase are shown to acquire elliptical and conical components.
中文翻译:
立方螺旋体中磁相的各向异性
摘要
从微观和现象学方法研究了具有 Dzyaloshinskii-Moriya 相互作用(MnSi、Cu 2 OSeO 3)的立方手性铁磁体的磁相。原子磁矩与局部晶体场的相互作用显示出立方各向异性项\(M_{x}^{4}\) + \(M_{y}^{4}\) + \(M_ {z}^{4}\) ( M是朗道-利夫希茨能量中的磁化场)。该项负责在接近零的磁场中存在螺旋相,并且可以有助于磁性 A 相在较高磁场中的稳定性。在各种磁场下模拟 A 相。当磁场打开时,螺旋相中的螺旋线显示为获取椭圆形和圆锥形分量。