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Title: Electrical Switching of Tristate Antiferromagnetic Néel Order in α - Fe 2 O 3 Epitaxial Films

Abstract

In this work, we demonstrate non-decaying, step-like electrical switching of tri-state Néel order in Pt/alpha-Fe 2O 3 bilayers detected by spin-Hall induced anomalous Hall effect. The as-grown Pt/alpha-Fe 2O 3 bilayers exhibit saw-tooth switching behavior generated by current pulses. After annealing by a high pulse current, the Hall signals reveal single-pulse saturated, non-decaying, step-like switching. Together with control experiments, we show that the saw-tooth switching is due to an artifact of Pt while the actual spin-orbit torque induced antiferromagnetic switching is step-like. Lastly, our Monte-Carlo simulations explain the switching behavior of alpha-Fe 2O 3 Néel order among three in-plane easy axes.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Research Org.:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1594169
Report Number(s):
DOE-OSU-01304
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
SC0001304; DMR-1420451
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 124; Journal Issue: 2; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Antiferromagnetic insulator; electrical switching; Fe2O3

Citation Formats

Cheng, Yang, Yu, Sisheng, Zhu, Menglin, Hwang, Jinwoo, and Yang, Fengyuan. Electrical Switching of Tristate Antiferromagnetic Néel Order in α-Fe2O3 Epitaxial Films. United States: N. p., 2020. Web. doi:10.1103/PhysRevLett.124.027202.
Cheng, Yang, Yu, Sisheng, Zhu, Menglin, Hwang, Jinwoo, & Yang, Fengyuan. Electrical Switching of Tristate Antiferromagnetic Néel Order in α-Fe2O3 Epitaxial Films. United States. doi:10.1103/PhysRevLett.124.027202.
Cheng, Yang, Yu, Sisheng, Zhu, Menglin, Hwang, Jinwoo, and Yang, Fengyuan. Mon . "Electrical Switching of Tristate Antiferromagnetic Néel Order in α-Fe2O3 Epitaxial Films". United States. doi:10.1103/PhysRevLett.124.027202.
@article{osti_1594169,
title = {Electrical Switching of Tristate Antiferromagnetic Néel Order in α-Fe2O3 Epitaxial Films},
author = {Cheng, Yang and Yu, Sisheng and Zhu, Menglin and Hwang, Jinwoo and Yang, Fengyuan},
abstractNote = {In this work, we demonstrate non-decaying, step-like electrical switching of tri-state Néel order in Pt/alpha-Fe2O3 bilayers detected by spin-Hall induced anomalous Hall effect. The as-grown Pt/alpha-Fe2O3 bilayers exhibit saw-tooth switching behavior generated by current pulses. After annealing by a high pulse current, the Hall signals reveal single-pulse saturated, non-decaying, step-like switching. Together with control experiments, we show that the saw-tooth switching is due to an artifact of Pt while the actual spin-orbit torque induced antiferromagnetic switching is step-like. Lastly, our Monte-Carlo simulations explain the switching behavior of alpha-Fe2O3 Néel order among three in-plane easy axes.},
doi = {10.1103/PhysRevLett.124.027202},
journal = {Physical Review Letters},
number = 2,
volume = 124,
place = {United States},
year = {2020},
month = {1}
}

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