文章信息/Info

Title:

Recent Advances on Electrical Control of Magnetism

作者:

宋成; 李凡; 顧有地; 張瑞琪; 周效楓; 潘峰

清華大學(xué)材料學(xué)院

Author(s):

SONG Cheng; LI Fan; GU Youdi; ZHANG Ruiqi; ZHOU Xiaofeng; PAN Feng

School of Materials Science and Engineering, Tsinghua University

關(guān)鍵詞:

電控磁效應(yīng); 自旋電子學(xué); 電控軌道效應(yīng); 磁電耦合; 離子液體

Keywords:

electrical control of magnetism;  spintronics;  electrical control of orbital;  magnetoelectric coupling;  ionic liquid

DOI:

10.7502/j.issn.1674-3962.2018.08.01

文獻(xiàn)標(biāo)志碼:

A

摘要:

電控磁效應(yīng)是利用電場調(diào)控材料磁學(xué)特性進(jìn)而實(shí)現(xiàn)數(shù)據(jù)存儲的一類物理效應(yīng)，具有豐富的物理內(nèi)涵和廣闊的應(yīng)用前景，因而受到越來越多研究者的關(guān)注。文章重點(diǎn)闡述了載流子調(diào)控、應(yīng)力調(diào)控、軌道重構(gòu)和電化學(xué)調(diào)控等主要電控磁機(jī)制的最新研究進(jìn)展，包括電場作用下超薄鐵磁金屬中載流子濃度和電子結(jié)構(gòu)的變化對磁性調(diào)控的核心作用、鐵電/鐵磁雙層結(jié)構(gòu)中鐵電層晶格變化誘導(dǎo)應(yīng)力對鐵磁層磁學(xué)行為的影響、氧化物異質(zhì)結(jié)界面過渡金屬元素3d軌道間的電荷轉(zhuǎn)移和軌道重構(gòu)對磁性調(diào)控的規(guī)律、以離子液體或具有高氧離子遷移的氧化物為柵極的體系中氧化還原反應(yīng)對磁性調(diào)控的途徑。文章還概述了電控磁效應(yīng)在磁隧道結(jié)和純電場作用下180°磁化翻轉(zhuǎn)等方面的應(yīng)用情況，以及在推動低功耗自旋電子學(xué)器件發(fā)展方面所扮演的角色；討論了電控磁效應(yīng)與反鐵磁自旋電子學(xué)結(jié)合所開展的最新研究工作。

Abstract:

Electrical control of magnetism (ECM) is defined as a method to modulate magnetism intrinsically by electrical means, providing an alternative avenue for data storage. ECM is attracting increasing interest and exciting significant research activity due to its profound physics and enormous potential for applications. This review article aims to provide a comprehensive review of recent progress in ECM, including materials, device configuration, magnetoelectric performance, and development trend. We summarize the recent understanding of the mechanisms responsible for the observed ECM behavior, including carrier density modulation, strain control, orbital reconstruction and electrochemical effect. That is, carrier density modulation and electronic structure variation are mainly responsible for the ECM in the ultrathin thin ferromagnetic metals; in ferroelectric/ferromagnetic bilayers the strain introduced by the piezoelectric behavior of the ferroelectric layer accounts for the magnetoelectric coupling; the charge transfer and orbital reconstruction between 3d transition�瞞etal ions affect the ferromagnetic behaviors at the oxide interface; the oxygen ions motion provides an avenue for the ECM in the system with high oxygen mobility or ionic liquid gating. Furthermore, we describe the potential applications of ECM in magnetic tunnel junctions and 180° magnetization switching with pure electric field effect, and the role of ECM on the spintronics with low power consumption. Finally, we discuss the recent progress of the works combining ECM and antiferromagnetic spintronics.