Néel spin-orbit torque driven antiferromagnetic resonance in Mn2 Au probed by time-domain THz spectroscopy

Autoren

N Bhattacharjee
AA Sapozhnik
S Yu Bodnar
V Yu Grigorev
SY Agustsson
J Cao
D Dominko
M Obergfell
O Gomonay
J Sinova
M Klaui
H-J Elmers
M Jourdan
J Demsar

Autoren-URL

https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000434213500008&DestLinkType=FullRecord&DestApp=WOS_CPL

DOI

10.1103/PhysRevLett.120.237201

eISSN

1079-7114

Externe Identifier

Clarivate Analytics Document Solution ID: GI2PN
PubMed Identifier: 29932703

ISSN

0031-9007

Ausgabe der Veröffentlichung

23

Zeitschrift

PHYSICAL REVIEW LETTERS

Datum der Veröffentlichung

2018

Status

Published

Titel

Neel Spin-Orbit Torque Driven Antiferromagnetic Resonance in Mn<sub>2</sub>Au Probed by Time-Domain THz Spectroscopy (Retracted Article)

Sub types

Article
Retracted Publication

Ausgabe der Zeitschrift

120

Data source: Web of Science (Lite)

Autoren

N Bhattacharjee
AA Sapozhnik
S Yu Bodnar
V Yu Grigorev
SY Agustsson
J Cao
D Dominko
M Obergfell
O Gomonay
J Sinova
M Kläui
H-J Elmers
M Jourdan
J Demsar

DOI

10.1103/physrevlett.120.237201

eISSN

1079-7114

ISSN

0031-9007

Ausgabe der Veröffentlichung

23

Zeitschrift

Physical Review Letters

Sprache

en

Artikelnummer

237201

Online publication date

2018

Status

Published online

Herausgeber

American Physical Society (APS)

Herausgeber URL

http://dx.doi.org/10.1103/physrevlett.120.237201

Datum der Datenerfassung

2018

Titel

Néel Spin-Orbit Torque Driven Antiferromagnetic Resonance in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>Mn</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:mi>Au</mml:mi></mml:mrow></mml:math> Probed by Time-Domain THz Spectroscopy

Ausgabe der Zeitschrift

120

Data source: Crossref

Abstract

We observe the excitation of collective modes in the terahertz (THz) range driven by the recently discovered Néel spin-orbit torques (NSOTs) in the metallic antiferromagnet Mn_{2}Au. Temperature-dependent THz spectroscopy reveals a strong absorption mode centered near 1 THz, which upon heating from 4 to 450 K softens and loses intensity. A comparison with the estimated eigenmode frequencies implies that the observed mode is an in-plane antiferromagnetic resonance (AFMR). The AFMR absorption strength exceeds those found in antiferromagnetic insulators, driven by the magnetic field of the THz radiation, by 3 orders of magnitude. Based on this and the agreement with our theory modeling, we infer that the driving mechanism for the observed mode is the current-induced NSOT. Here the electric field component of the THz pulse drives an ac current in the metal, which subsequently drives the AFMR. This electric manipulation of the Néel order parameter at high frequencies makes Mn_{2}Au a prime candidate for antiferromagnetic ultrafast memory applications.

Addresses

Institute of Physics, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany.

Autoren

N Bhattacharjee
AA Sapozhnik
S Yu Bodnar
V Yu Grigorev
SY Agustsson
J Cao
D Dominko
M Obergfell
O Gomonay
J Sinova
M Kläui
H-J Elmers
M Jourdan
J Demsar

DOI

10.1103/physrevlett.120.237201

eISSN

1079-7114

Externe Identifier

PubMed Identifier: 29932703

Funding acknowledgements

H2020 Future and Emerging Technologies: 766566
Grantová Agentura ?eské Republiky: 14-37427G
Seventh Framework Programme:
Deutsche Forschungsgemeinschaft: SHARP 397322108
Alexander von Humboldt-Stiftung:

Open access

false

ISSN

0031-9007

Ausgabe der Veröffentlichung

23

Zeitschrift

Physical review letters

Sprache

eng

Medium

Print

Paginierung

237201

Datum der Veröffentlichung

2018

Status

Published

Datum der Datenerfassung

2018

Titel

Néel Spin-Orbit Torque Driven Antiferromagnetic Resonance in Mn_{2}Au Probed by Time-Domain THz Spectroscopy.

Sub types

Retracted Publication
Journal Article

Ausgabe der Zeitschrift

120

Data source: Europe PubMed Central

Abstract

We observe the excitation of collective modes in the terahertz (THz) range driven by the recently discovered Néel spin-orbit torques (NSOTs) in the metallic antiferromagnet Mn_{2}Au. Temperature-dependent THz spectroscopy reveals a strong absorption mode centered near 1 THz, which upon heating from 4 to 450 K softens and loses intensity. A comparison with the estimated eigenmode frequencies implies that the observed mode is an in-plane antiferromagnetic resonance (AFMR). The AFMR absorption strength exceeds those found in antiferromagnetic insulators, driven by the magnetic field of the THz radiation, by 3 orders of magnitude. Based on this and the agreement with our theory modeling, we infer that the driving mechanism for the observed mode is the current-induced NSOT. Here the electric field component of the THz pulse drives an ac current in the metal, which subsequently drives the AFMR. This electric manipulation of the Néel order parameter at high frequencies makes Mn_{2}Au a prime candidate for antiferromagnetic ultrafast memory applications.

Autoren

N Bhattacharjee
AA Sapozhnik
S Yu Bodnar
V Yu Grigorev
SY Agustsson
J Cao
D Dominko
M Obergfell
O Gomonay
J Sinova
M Kläui
H-J Elmers
M Jourdan
J Demsar

Autoren-URL

https://www.ncbi.nlm.nih.gov/pubmed/29932703

DOI

10.1103/PhysRevLett.120.237201

eISSN

1079-7114

Ausgabe der Veröffentlichung

23

Zeitschrift

Phys Rev Lett

Sprache

eng

Country

United States

Paginierung

237201

Datum der Veröffentlichung

2018

Status

Published

Datum, an dem der Datensatz öffentlich gemacht wurde

2018

Titel

Néel Spin-Orbit Torque Driven Antiferromagnetic Resonance in Mn_{2}Au Probed by Time-Domain THz Spectroscopy.

Sub types

Journal Article
Retracted Publication

Ausgabe der Zeitschrift

120

Data source: PubMed

Néel spin-orbit torque driven antiferromagnetic resonance in Mn2 Au probed by time-domain THz spectroscopy

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