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Electrical Switching of Tristate Antiferromagnetic Neel Order in α-Fe2O3 Epitaxial Films

被引：111
|
作者：
Cheng, Yang [1 ]
Yu, Sisheng [1 ]
Zhu, Menglin [2 ]
Hwang, Jinwoo [2 ]
Yang, Fengyuan [1 ]
机构：
[1] Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA
[2] Ohio State Univ, Dept Mat Sci & Engn, 116 W 19Th Ave, Columbus, OH 43212 USA
来源：
PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 02期
关键词：
SPIN-TORQUE;
D O I：
10.1103/PhysRevLett.124.027202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We demonstrate nondecaying, steplike electrical switching of tristate Neel order in Pt/alpha-Fe2O3 bilayers detected by the spin-Hall induced anomalous Hall effect. The as-grown Pt/alpha-Fe2O3 bilayers exhibit sawtooth switching behavior generated by current pulses. After annealing by a high pulse current, the Hall signals reveal single-pulse saturated, nondecaying, steplike switching. Together with control experiments, we show that the sawtooth switching is due to an artifact of Pt while the actual spin-orbit torque induced antiferromagnetic switching is steplike. Our Monte Carlo simulations explain the switching behavior of alpha-Fe(2)O(3 )Neel order among three in-plane easy axes.
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页数：6
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