Thermodynamically stable magnetic vortex states in magnetic crystals

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 1994-12-01 DOI:10.1016/0304-8853(94)90046-9

A. Bogdanov, A. Hubert

引用次数: 0

Abstract

Magnetic vortices can be stabilized in magnetic materials by a so-called Dzyaloshinsky interaction. Their structure is calculated systematically for uniaxial ferromagnetic materials of the easy-axis type by numerically solving the differential equations in the circular cell approximation. In reduced units two external parameters are left over: the value of an external field parallel to the crystal axis and the relative strength of the Dzyaloshinsky interaction. A phase diagram in these variables consists of three thermodynamically stable phases: a uniform state at high field values, a one-dimensionally modulated spiral state at low fields and the new vortex state in an intermediate field range. The corresponding calculated magnetization curves clearly show the transitions between these states.

查看原文本刊更多论文

磁性晶体中热力学稳定的磁涡旋态

磁性材料中的磁涡流可以通过所谓的Dzyaloshinsky相互作用来稳定。对易轴型单轴铁磁材料，通过对圆胞近似微分方程的数值求解，系统地计算了其结构。在简化的单位中，剩下两个外部参数：平行于晶体轴的外场值和Dzyaloshinsky相互作用的相对强度。这些变量的相图由三个热力学稳定相组成：高场值时的均匀态，低场时的一维调制螺旋态和中间场范围内的新涡态。相应的计算磁化曲线清楚地显示了这些状态之间的转变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.