Evolution of modes in magnetic tunnel junctions under various field orientations

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-08-09 DOI:10.1016/j.jmmm.2025.173425

Mariia D. Lobkova , Georgy A. Kichin , Petr N. Skirdkov , Konstantin A. Zvezdin

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引用次数: 0

Abstract

Magnetic tunnel junctions (MTJs) offer significant potential for next-generation spintronic devices operating in the microwave regime. An important feature of MTJs is their ability to rectify signals in the GHz frequency range. To further improve their microwave performance, it is critical to investigate how the orientation of the external magnetic field affects the magnetization dynamics. We perform an experimental and micromagnetic study to analyze how the direction and magnitude of the in-plane magnetic field affect the behavior of free-layer modes in a 100 nm diameter MTJ. We experimentally found a bulk mode and an edge mode in the free layer. By varying the in-plane field orientation, we identify regions with improved rectification by 50 degrees, control their width, and demonstrate how they can be frequency shifted. We also use an analytical model and micromagnetic simulations to analyze the nature and behavior of the observed modes.

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不同场取向下磁隧道结模式的演化

磁隧道结（MTJs）为在微波环境下工作的下一代自旋电子器件提供了巨大的潜力。mtj的一个重要特征是它们能够校正GHz频率范围内的信号。为了进一步提高其微波性能，研究外磁场方向对磁化动力学的影响至关重要。我们进行了实验和微磁研究，分析了面内磁场的方向和大小如何影响100 nm直径MTJ中自由层模式的行为。我们通过实验发现了自由层中的体模和边缘模。通过改变面内场方向，我们确定了具有50度改进整流的区域，控制其宽度，并演示了它们如何可以频移。我们还使用分析模型和微磁模拟来分析观察到的模式的性质和行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.