Giant gate modulation of antiferromagnetic spin reversal by the magnetoelectric effect

IF 8.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Npg Asia Materials Pub Date : 2024-04-05 DOI:10.1038/s41427-024-00541-z

Kakeru Ujimoto, Hiroki Sameshima, Kentaro Toyoki, Takahiro Moriyama, Kohji Nakamura, Yoshinori Kotani, Motohiro Suzuki, Ion Iino, Naomi Kawamura, Ryoichi Nakatani, Yu Shiratsuchi

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Abstract

In this study, using the Pt/Cr₂O₃/Pt epitaxial trilayer, we demonstrate the giant voltage modulation of the antiferromagnetic spin reversal and the voltage-induced 180° switching of the Néel vector in maintaining a permanent magnetic field. We obtained a significant modulation efficiency of the switching field, Δμ₀H_SW/ΔV (Δμ₀H_SW/ΔE), reaching a maximum of −500 mT/V (−4.80 T nm/V); this value was more than 50 times greater than that of the ferromagnetic-based counterparts. From the temperature dependence of the modulation efficiency, X-ray magnetic circular dichroism measurements and first-principles calculations, we showed that the origin of the giant modulation efficiency relied on the electric field modulation of the net magnetization due to the magnetoelectric effect. From the first-principles calculation and the thickness effect on the offset electric field, we found that the interfacial magnetoelectric effect emerged. Our demonstration reveals the energy-efficient and widely applicable operation of an antiferromagnetic spin based on a mechanism distinct from magnetic anisotropy control.

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磁电效应对反铁磁自旋反转的巨门调制

在这项研究中，我们利用 Pt/Cr2O3/Pt 外延三层，展示了反铁磁性自旋反转的巨电压调制，以及在维持永久磁场时电压诱导的奈尔矢量 180° 切换。我们获得了开关磁场的显著调制效率Δμ0HSW/ΔV（Δμ0HSW/ΔE），最大值为-500 mT/V (-4.80 T nm/V)；该值比铁磁基对应物高出 50 多倍。从调制效率的温度依赖性、X 射线磁圆二色性测量和第一性原理计算中，我们发现巨调制效率的起源依赖于磁电效应对净磁化的电场调制。通过第一原理计算和厚度对偏移电场的影响，我们发现出现了界面磁电效应。我们的演示揭示了基于不同于磁各向异性控制机制的反铁磁自旋的高能效和广泛应用。

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来源期刊

Npg Asia Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

15.40

自引率

1.00%

发文量

审稿时长

2 months

期刊介绍： NPG Asia Materials is an open access, international journal that publishes peer-reviewed review and primary research articles in the field of materials sciences. The journal has a global outlook and reach, with a base in the Asia-Pacific region to reflect the significant and growing output of materials research from this area. The target audience for NPG Asia Materials is scientists and researchers involved in materials research, covering a wide range of disciplines including physical and chemical sciences, biotechnology, and nanotechnology. The journal particularly welcomes high-quality articles from rapidly advancing areas that bridge the gap between materials science and engineering, as well as the classical disciplines of physics, chemistry, and biology. NPG Asia Materials is abstracted/indexed in Journal Citation Reports/Science Edition Web of Knowledge, Google Scholar, Chemical Abstract Services, Scopus, Ulrichsweb (ProQuest), and Scirus.