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

doi:10.1103/PhysRevLett.124.027202

This content will become publicly available on January 13, 2021

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:

Cheng, Yang ^[1]; Yu, Sisheng ^[1]; Zhu, Menglin ^[1]; Hwang, Jinwoo ^[1];

^[1]

The Ohio State Univ., Columbus, OH (United States)

Publication Date:: 2020-01-13

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.

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                    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.

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                    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.

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@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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This content will become publicly available on January 13, 2021

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

Abstract

Citation Formats

Terahertz Antiferromagnetic Spin Hall Nano-Oscillator journal, May 2016

Writing and reading of an arbitrary optical polarization state in an antiferromagnet journal, November 2014

Spin-Torque Switching with the Giant Spin Hall Effect of Tantalum journal, May 2012

Writing and reading antiferromagnetic Mn2Au by Néel spin-orbit torques and large anisotropic magnetoresistance journal, January 2018

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Coherent terahertz control of antiferromagnetic spin waves journal, November 2010

Spin transport and spin torque in antiferromagnetic devices journal, March 2018

Observation of magnetic vortex pairs at room temperature in a planar α-Fe2O3/Co heterostructure journal, June 2018

Magnetic-field-induced color change in α -Fe 2 O 3 single crystals journal, May 2012

Spin Seebeck Imaging of Spin-Torque Switching in Antiferromagnetic Pt / NiO Heterostructures journal, October 2019

Antiferromagnetic spintronics journal, February 2018

Mechanism of Néel Order Switching in Antiferromagnetic Thin Films Revealed by Magnetotransport and Direct Imaging journal, October 2019

Spin Hall Effects in Metallic Antiferromagnets journal, November 2014

Effect of Polarized Current on the Magnetic State of an Antiferromagnet journal, July 2007

Current-Induced Switching of Perpendicularly Magnetized Magnetic Layers Using Spin Torque from the Spin Hall Effect journal, August 2012

FMR-driven spin pumping in Y 3 Fe 5 O 12 -based structures journal, May 2018

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Strong Orientation-Dependent Spin-Orbit Torque in Thin Films of the Antiferromagnet Mn 2 Au journal, May 2018

Antidamping-Torque-Induced Switching in Biaxial Antiferromagnetic Insulators journal, May 2018

Full angular dependence of the spin Hall and ordinary magnetoresistance in epitaxial antiferromagnetic NiO(001)/Pt thin films journal, July 2018

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Current-induced switching in a magnetic insulator journal, November 2016

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Room-temperature antiferromagnetic memory resistor journal, January 2014

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Title: Electrical Switching of Tristate Antiferromagnetic Néel Order in $α - {Fe}_{2} O_{3}$ Epitaxial Films

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journal, May 2016

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journal, November 2014

Spin-Torque Switching with the Giant Spin Hall Effect of Tantalum
journal, May 2012

Writing and reading antiferromagnetic Mn2Au by Néel spin-orbit torques and large anisotropic magnetoresistance
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journal, October 2019

Antiferromagnetic spintronics
journal, February 2018

Mechanism of Néel Order Switching in Antiferromagnetic Thin Films Revealed by Magnetotransport and Direct Imaging
journal, October 2019

Spin Hall Effects in Metallic Antiferromagnets
journal, November 2014

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journal, July 2007

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journal, August 2012

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journal, May 2018

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journal, May 2018

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Full angular dependence of the spin Hall and ordinary magnetoresistance in epitaxial antiferromagnetic NiO(001)/Pt thin films
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Spin-flip anomalies in epitaxial α-Fe2O3 films by Mössbauer spectroscopy
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Epitaxial films of Heusler compound Co ₂ FeAl _0.5 Si _0.5 with high crystalline quality grown by off-axis sputtering
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journal, July 2014

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journal, September 2018

Magnetic properties of Fe 2 O 3 ( 0001 ) thin layers studied by soft x-ray linear dichroism
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