Robust picosecond writing of a layered antiferromagnet by staggered spin-orbit fields

被引：59

作者：

Roy, P. E. ^{[1
]}

Otxoa, R. M. ^{[1
]}

Wunderlich, J. ^{[1
,2
]}

机构：

[1] Hitachi Cambridge Lab, JJ Thomson Ave, Cambridge CB3 0HE, England

[2] Inst Phys ASCR, Vvi, Cukrovarnicka 10, Prague 16253 6, Czech Republic

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 01期

关键词：

MN2AU; SPINTRONICS;

D O I：

10.1103/PhysRevB.94.014439

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultrafast electrical switching by current-induced staggered spin-orbit fields, with minimal risk of overshoot is shown in layered easy-plane antiferromagnets with basal-plane anisotropies. Reliable switching is due to the fieldlike torque, relaxing stringent requirements with respect to precision in the duration of the excitation pulse. Focus is put on a system with weak planar biaxial anisotropy. We investigate the switching as a function of the spin-orbit field strength, pulse duration, rise and fall times, and damping using atomistic spin dynamics simulations and an effective equation for the antiferromagnetic order parameter. The critical spin-orbit field strength required for switching a biaxial system is determined, and we show that writing is possible at feasible current magnitudes. Finally, we discuss switching of systems exhibiting a dominant uniaxial basal-plane anisotropy.

引用

页数：5

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