Ru/IrMn Interfacial Orbital-to-Spin Conversion for Antiferromagnetic Switching in Magnetic Tunnel Junctions.

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-10-01 DOI:10.1021/acs.nanolett.5c03188

Yue Bai,Wenlong Cai,Zanhong Chen,Daoqian Zhu,Shiyang Lu,Jiaxu Li,Ao Du,Kaihua Cao,Guang Yang,Hongxi Liu,Kewen Shi,Weisheng Zhao

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引用次数: 0

Abstract

Current-induced antiferromagnetic (AFM) switching is critical for advancing spintronic technologies and expanding their functional landscape. Recently, the orbital Hall effect (OHE) has emerged as a promising mechanism for efficient control of AFM orders, though experimental validation has remained elusive. In this work, we successfully demonstrate efficient orbital-to-spin conversion in Ru/IrMn heterostructure, which enables significant enhancement of both OHE-induced damping-like and field-like torque efficiencies of 0.86 × 105 Ω-1m-1 and 3.01 × 105 Ω-1m-1, respectively. We further investigate the underlying orbital and spin diffusion behavior, revealing a rapid and efficient interfacial conversion mechanism. Additionally, we achieve complete, field-free OHE-induced AFM switching in 80 nm Ru/IrMn-based exchange-bias magnetic tunnel junctions (EB-MTJs), with an ultrafast 0.2 ns write speed and low energy consumption. These results establish a viable route for orbitronic manipulation of AFMs and offer a promising approach for ultrafast, low-power, and scalable spintronic devices.

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磁隧道结中反铁磁开关的Ru/IrMn界面轨道-自旋转换。

电流感应反铁磁（AFM）开关是推进自旋电子技术和扩展其功能领域的关键。最近，轨道霍尔效应（OHE）作为一种有效控制原子力显微镜顺序的有希望的机制出现，尽管实验验证仍然难以捉摸。在这项工作中，我们成功地证明了Ru/IrMn异质结构中有效的轨道到自旋转换，这使得ohed诱导的类阻尼和类场扭矩效率分别显著提高了0.86 × 105 Ω-1m-1和3.01 × 105 Ω-1m-1。我们进一步研究了潜在的轨道和自旋扩散行为，揭示了一个快速有效的界面转化机制。此外，我们在80 nm Ru/ irmn基交换偏置磁隧道结（EB-MTJs）中实现了完全的无场ohe诱导AFM开关，具有超快的0.2 ns写入速度和低能耗。这些结果为原子力显微镜的轨道操纵建立了一条可行的途径，并为超快、低功耗和可扩展的自旋电子器件提供了一条有前途的途径。

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

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.