Ionic Modulation of the Interfacial Magnetism in a Bilayer System Comprising a Heavy Metal and a Magnetic Insulator for Voltage-Tunable Spintronic Devices
Ionic Modulation of the Interfacial Magnetism in a Bilayer System Comprising a Heavy Metal and a Magnetic Insulator for Voltage-Tunable Spintronic Devices
复制标题
用于电压可调自旋电子器件的包含重金属和磁绝缘体的双层系统中界面磁性的离子调制
DOI：
10.1002/adma.201802902
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发表时间：
2018-10-04
影响因子：
29.4
通讯作者：
Liu, Ming
中科院分区：
文献类型：
--
作者：
Guan, Mengmeng;Wang, Lei;Liu, Ming
钇铁石榴石(YIG)的电压调制具有实际意义和理论意义，它具有结构紧凑、响应速度快、能量效率高等优点，可用于自旋霍尔、自旋泵浦和自旋-塞贝克效应等多种自旋电子学应用。在本研究中，在离子调制下，YIG/PT双层异质结中实现了显著的铁磁共振变化，这是通过改变沉积的覆盖铂层中的界面磁性来实现的。在4.5V的小偏压下，YIG(13 Nm)/Pt(3 Nm)/(离子液体，IL)/(Au电容器)异质结获得了较大的铁磁场漂移690Oe。这种显著的磁电可调性来自于由铂金属层中未补偿的d轨道电子引起的额外的和电压感生的铁磁有序。经第一性原理计算证实，这一发现为新型电压可调的YIG基自旋电子学铺平了道路。
The voltage modulation of yttrium iron garnet (YIG) is of practical and theoretical significance; due to its advantages of compactness, high-speed response, and energy efficiency, it can be used for various spintronic applications, including spin-Hall, spin-pumping, and spin-Seebeck effects. In this study, a significant ferromagnetic resonance change is achieved within the YIG/Pt bilayer heterostructures uisng ionic modulation, which is accomplished by modifying the interfacial magnetism in the deposited capping platinum layer. With a small voltage bias of 4.5 V, a large ferromagnetic field shift of 690 Oe is achieved in heterostructures of YIG (13 nm)/Pt (3 nm)/(ionic liquid, IL)/(Au capacitor). The remarkable magnetoelectric (ME) tunability comes from the additional and voltage-induced ferromagnetic ordering, caused by uncompensated d-orbital electrons in the Pt metal layer. Confirmed by first-principle calculations, this finding paves the way for novel voltage-tunable YIG-based spintronics.