arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1809.01680cond-mat.str-el
收藏

外磁场中受抑螺旋磁网络中的螺旋平面触发器

Spiral plane flops in frustrated helimagnets in external magnetic field

O. I. Utesov, A. V. Syromyatnikov

摘要:

本文从理论上讨论了磁场$\bf H$中的受抑海森堡螺旋磁体。我们证明,小的各向异性自旋相互作用(单离子双轴各向异性或偶极力)选择自旋旋转的平面(螺旋平面),并可能导致平面内场增加后的螺旋平面翻转。导出了临界场$H_{flop}$的表达式。结果表明,测量$H_{flop}$是一种有效而简单的量化系统各向异性的方法(如测量具有轴向各向异性的共线磁体中的自旋翻转场)。相应的最近的实验被认为是在螺旋磁铁,其中一些是多铁性的自旋起源。

英文摘要:

We discuss theoretically frustrated Heisenberg spiral magnets in magnetic field $\bf H$. We demonstrate that small anisotropic spin interactions (single-ion biaxial anisotropy or dipolar forces) select the plane in which spins rotate (spiral plane) and can lead to the spiral plane flop upon in-plane field increasing. Expressions for the critical fields $H_{flop}$ are derived. It is shown that measuring of $H_{flop}$ is an efficient and simple method of quantifying the anisotropy in the system (as the measurement of spin-flop fields in collinear magnets with axial anisotropy). Corresponding recent experiments are considered in spiral magnets some of which are multiferroics of spin origin.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑