Solar manipulations of perpendicular magnetic anisotropy for flexible spintronics

IF 6.5 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Frontiers of Physics Pub Date : 2024-01-24 DOI:10.1007/s11467-023-1377-0

Zhexi He, Yifan Zhao, Yujing Du, Meng Zhao, Yuxuan Jiang, Ming Liu, Ziyao Zhou

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Abstract

Flexible electronics/spintronics attracts researchers’ attention for their application potential abroad in wearable devices, healthcare, and other areas. Those devices’ performance (speed, energy consumption) is highly dependent on manipulating information bits (spin-orientation in flexible spintronics). In this work, we established an organic photovoltaic (OPV)/ ZnO/Pt/Co/Pt heterostructure on flexible PET substrates with perpendicular magnetic anisotropy (PMA). Under sunlight illumination, the photo-electrons generated from the OPV layer transfer into the PMA heterostructure, then they reduce the PMA strength by enhancing the interfacial Rashba field accordingly. The coercive field (H_c) reduces from 800 Oe to 500 Oe at its maximum, and the magnetization can be switched up and down reversibly. The stability of sunlight control of magnetization reversal under various bending conditions is also tested for flexible spintronic applications. Lastly, the voltage output of sunlight-driven PMA is achieved in our prototype device, exhibiting an excellent angular dependence and opening a door towards solar-driven flexible spintronics with much lower energy consumption.

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太阳能操纵垂直磁各向异性以实现柔性自旋电子学

柔性电子学/自旋电子学因其在国外可穿戴设备、医疗保健和其他领域的应用潜力而备受研究人员关注。这些设备的性能（速度、能耗）在很大程度上取决于信息比特的操作（柔性自旋电子学中的自旋方向）。在这项工作中，我们在具有垂直磁各向异性（PMA）的柔性 PET 基底上建立了有机光伏（OPV）/ ZnO/Pt/Co/Pt 异质结构。在阳光照射下，OPV 层产生的光电子转移到 PMA 异质结构中，然后通过增强界面拉什巴场相应地降低 PMA 强度。矫顽力场（Hc）从 800 Oe 降低到最大值 500 Oe，磁化率可以上下可逆切换。此外，还测试了在各种弯曲条件下阳光控制磁化反转的稳定性，以实现灵活的自旋电子应用。最后，我们的原型装置实现了阳光驱动 PMA 的电压输出，表现出极佳的角度依赖性，为实现能耗更低的太阳能驱动柔性自旋电子学打开了一扇大门。

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来源期刊

Frontiers of Physics PHYSICS, MULTIDISCIPLINARY-

CiteScore

9.20

自引率

9.30%

发文量

898

审稿时长

6-12 weeks

期刊介绍： Frontiers of Physics is an international peer-reviewed journal dedicated to showcasing the latest advancements and significant progress in various research areas within the field of physics. The journal's scope is broad, covering a range of topics that include: Quantum computation and quantum information Atomic, molecular, and optical physics Condensed matter physics, material sciences, and interdisciplinary research Particle, nuclear physics, astrophysics, and cosmology The journal's mission is to highlight frontier achievements, hot topics, and cross-disciplinary points in physics, facilitating communication and idea exchange among physicists both in China and internationally. It serves as a platform for researchers to share their findings and insights, fostering collaboration and innovation across different areas of physics.