Song Cheng, You Yunfeng, Chen Xianzhe, Zhou Xiaofeng, Wang Yuyan, Pan Feng
Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China. Beijing Innovation Center for Future Chip, Tsinghua University, Beijing 100084, People's Republic of China.
Nanotechnology. 2018 Mar 16;29(11):112001. doi: 10.1088/1361-6528/aaa812.
Antiferromagnetic materials, which have drawn considerable attention recently, have fascinating features: they are robust against perturbation, produce no stray fields, and exhibit ultrafast dynamics. Discerning how to efficiently manipulate the magnetic state of an antiferromagnet is key to the development of antiferromagnetic spintronics. In this review, we introduce four main methods (magnetic, strain, electrical, and optical) to mediate the magnetic states and elaborate on intrinsic origins of different antiferromagnetic materials. Magnetic control includes a strong magnetic field, exchange bias, and field cooling, which are traditional and basic. Strain control involves the magnetic anisotropy effect or metamagnetic transition. Electrical control can be divided into two parts, electric field and electric current, both of which are convenient for practical applications. Optical control includes thermal and electronic excitation, an inertia-driven mechanism, and terahertz laser control, with the potential for ultrafast antiferromagnetic manipulation. This review sheds light on effective usage of antiferromagnets and provides a new perspective on antiferromagnetic spintronics.
反铁磁材料近年来备受关注，具有迷人的特性：它们对微扰具有鲁棒性，不产生杂散场，并展现出超快动力学。弄清楚如何有效操控反铁磁体的磁态是反铁磁自旋电子学发展的关键。在本综述中，我们介绍了四种调节磁态的主要方法（磁控、应变调控、电调控和光调控），并阐述了不同反铁磁材料的内在起源。磁控包括强磁场、交换偏置和场冷，这些都是传统且基础的方法。应变调控涉及磁各向异性效应或变磁转变。电调控可分为电场和电流两部分，二者在实际应用中都很便捷。光调控包括热激发和电子激发、惯性驱动机制以及太赫兹激光控制，具有实现超快反铁磁操控的潜力。本综述阐明了反铁磁体的有效利用方式，并为反铁磁自旋电子学提供了新的视角。
