Control of Néel Vector with Spin-Orbit Torques in an Antiferromagnetic Insulator with Tilted Easy Plane

Pengxiang Zhang; Chung Tao Chou; Hwanhui Yun; Brooke C. McGoldrick; Justin T. Hou; K. Andre Mkhoyan; Luqiao Liu

doi:10.1103/PhysRevLett.129.017203

Control of Néel Vector with Spin-Orbit Torques in an Antiferromagnetic Insulator with Tilted Easy Plane

Pengxiang Zhang, Chung Tao Chou, Hwanhui Yun, Brooke C. McGoldrick, Justin T. Hou, K. Andre Mkhoyan, Luqiao Liu

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Injecting spin currents into antiferromagnets and realizing efficient spin-orbit-torque switching represents a challenging topic. Because of the diminishing magnetic susceptibility, current-induced antiferromagnetic dynamics remain poorly characterized, complicated by spurious effects. Here, by growing a thin film antiferromagnet, α-Fe2O3, along its nonbasal plane orientation, we realize a configuration where the spin-orbit torque from an injected spin current can unambiguously rotate and switch the Néel vector within the tilted easy plane, with an efficiency comparable to that of classical ferrimagnetic insulators. Our study introduces a new platform for quantitatively characterizing switching and oscillation dynamics in antiferromagnets.

Original language	English (US)
Article number	017203
Journal	Physical review letters
Volume	129
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.129.017203
State	Published - Jul 1 2022

Bibliographical note

Funding Information:
This work is supported by National Science Foundation under Award No. DMR-2104912, AFOSR through Award No. FA9550-19-1-0048, and Semiconductor Research Corporation SMART center. P. Z. acknowledges support from Mathworks fellowship. H. Y. and K. A. M. were partially supported by University of Minnesota (UMN) MRSEC program DMR-2011401. The electron microscopy work was carried out in the Characterization Facility of University of Minnesota supported in part by the NSF through the UMN MRSEC.

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© 2022 American Physical Society.

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title = "Control of N{\'e}el Vector with Spin-Orbit Torques in an Antiferromagnetic Insulator with Tilted Easy Plane",

abstract = "Injecting spin currents into antiferromagnets and realizing efficient spin-orbit-torque switching represents a challenging topic. Because of the diminishing magnetic susceptibility, current-induced antiferromagnetic dynamics remain poorly characterized, complicated by spurious effects. Here, by growing a thin film antiferromagnet, α-Fe2O3, along its nonbasal plane orientation, we realize a configuration where the spin-orbit torque from an injected spin current can unambiguously rotate and switch the N{\'e}el vector within the tilted easy plane, with an efficiency comparable to that of classical ferrimagnetic insulators. Our study introduces a new platform for quantitatively characterizing switching and oscillation dynamics in antiferromagnets.",

author = "Pengxiang Zhang and Chou, {Chung Tao} and Hwanhui Yun and McGoldrick, {Brooke C.} and Hou, {Justin T.} and Mkhoyan, {K. Andre} and Luqiao Liu",

note = "Funding Information: This work is supported by National Science Foundation under Award No. DMR-2104912, AFOSR through Award No. FA9550-19-1-0048, and Semiconductor Research Corporation SMART center. P. Z. acknowledges support from Mathworks fellowship. H. Y. and K. A. M. were partially supported by University of Minnesota (UMN) MRSEC program DMR-2011401. The electron microscopy work was carried out in the Characterization Facility of University of Minnesota supported in part by the NSF through the UMN MRSEC. Publisher Copyright: {\textcopyright} 2022 American Physical Society. ",

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doi = "10.1103/PhysRevLett.129.017203",

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AU - Zhang, Pengxiang

AU - Chou, Chung Tao

AU - Yun, Hwanhui

AU - McGoldrick, Brooke C.

AU - Hou, Justin T.

AU - Mkhoyan, K. Andre

AU - Liu, Luqiao

N1 - Funding Information: This work is supported by National Science Foundation under Award No. DMR-2104912, AFOSR through Award No. FA9550-19-1-0048, and Semiconductor Research Corporation SMART center. P. Z. acknowledges support from Mathworks fellowship. H. Y. and K. A. M. were partially supported by University of Minnesota (UMN) MRSEC program DMR-2011401. The electron microscopy work was carried out in the Characterization Facility of University of Minnesota supported in part by the NSF through the UMN MRSEC. Publisher Copyright: © 2022 American Physical Society.

PY - 2022/7/1

Y1 - 2022/7/1

N2 - Injecting spin currents into antiferromagnets and realizing efficient spin-orbit-torque switching represents a challenging topic. Because of the diminishing magnetic susceptibility, current-induced antiferromagnetic dynamics remain poorly characterized, complicated by spurious effects. Here, by growing a thin film antiferromagnet, α-Fe2O3, along its nonbasal plane orientation, we realize a configuration where the spin-orbit torque from an injected spin current can unambiguously rotate and switch the Néel vector within the tilted easy plane, with an efficiency comparable to that of classical ferrimagnetic insulators. Our study introduces a new platform for quantitatively characterizing switching and oscillation dynamics in antiferromagnets.

AB - Injecting spin currents into antiferromagnets and realizing efficient spin-orbit-torque switching represents a challenging topic. Because of the diminishing magnetic susceptibility, current-induced antiferromagnetic dynamics remain poorly characterized, complicated by spurious effects. Here, by growing a thin film antiferromagnet, α-Fe2O3, along its nonbasal plane orientation, we realize a configuration where the spin-orbit torque from an injected spin current can unambiguously rotate and switch the Néel vector within the tilted easy plane, with an efficiency comparable to that of classical ferrimagnetic insulators. Our study introduces a new platform for quantitatively characterizing switching and oscillation dynamics in antiferromagnets.

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Control of Néel Vector with Spin-Orbit Torques in an Antiferromagnetic Insulator with Tilted Easy Plane

Abstract

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IRG-1: Ionic Control of Materials

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Control of Néel Vector with Spin-Orbit Torques in an Antiferromagnetic Insulator with Tilted Easy Plane

Abstract

Bibliographical note

MRSEC Support

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IRG-1: Ionic Control of Materials

University of Minnesota Materials Research Science and Engineering Center (DMR-2011401)

Cite this