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Inertial spin dynamics in ferromagnets

Neeraj, Kumar and Awari, Nilesh and Kovalev, Sergey and Polley, Debanjan and Hagström, Nanna Zhou and Arekapudi, Sri Sai Phani Kanth and Semisalova, Anna and Lenz, Kilian and Green, Bertram and Deinert, Jan-Christoph and Ilyakov, Igor and Chen, Min and Bawatna, Mohammed and Scalera, Valentino and d’Aquino, Massimiliano and Serpico, Claudio and Hellwig, Olav and Wegrowe, Jean-Eric and Gensch, Michael and Bonetti, Stefano (2020) Inertial spin dynamics in ferromagnets. Nature Physics, pp. 1-6. Nature Publishing Group. doi: 10.1038/s41567-020-01040-y. ISSN 1745-2473.

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Official URL: https://www.nature.com/articles/s41567-020-01040-y

Abstract

The understanding of how spins move and can be manipulated at pico- and femtosecond timescales has implications for ultrafast and energy-efficient data-processing and storage applications. However, the possibility of realizing commercial technologies based on ultrafast spin dynamics has been hampered by our limited knowledge of the physics behind processes on this timescale. Recently, it has been suggested that inertial effects should be considered in the full description of the spin dynamics at these ultrafast timescales, but a clear observation of such effects in ferromagnets is still lacking. Here, we report direct experimental evidence of intrinsic inertial spin dynamics in ferromagnetic thin films in the form of a nutation of the magnetization at a frequency of ~0.5 THz. This allows us to reveal that the angular momentum relaxation time in ferromagnets is on the order of 10 ps.

Item URL in elib:https://elib.dlr.de/140008/
Document Type:Article
Title:Inertial spin dynamics in ferromagnets
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Neeraj, KumarUniversity StockholmUNSPECIFIEDUNSPECIFIED
Awari, NileshHZDRUNSPECIFIEDUNSPECIFIED
Kovalev, SergeyHZDRUNSPECIFIEDUNSPECIFIED
Polley, DebanjanUniversity StockholmUNSPECIFIEDUNSPECIFIED
Hagström, Nanna ZhouUniversity StockholmUNSPECIFIEDUNSPECIFIED
Arekapudi, Sri Sai Phani KanthTU ChemnitzUNSPECIFIEDUNSPECIFIED
Semisalova, AnnaUniversität Duisburg-EsserUNSPECIFIEDUNSPECIFIED
Lenz, KilianHelmholtz-Zentrum Dresden-RossendorfUNSPECIFIEDUNSPECIFIED
Green, BertramHZDRUNSPECIFIEDUNSPECIFIED
Deinert, Jan-ChristophHelmholtz-Zentrum Dresden-RossendorfUNSPECIFIEDUNSPECIFIED
Ilyakov, IgorHelmholtz-Zentrum Dresden-RossendorfUNSPECIFIEDUNSPECIFIED
Chen, MinHelmholtz-Zentrum Dresden-Rossendorf / Technische Universität BerlinUNSPECIFIEDUNSPECIFIED
Bawatna, MohammedHZDRUNSPECIFIEDUNSPECIFIED
Scalera, ValentinoUniversity NaplesUNSPECIFIEDUNSPECIFIED
d’Aquino, MassimilianoUniversity NaplesUNSPECIFIEDUNSPECIFIED
Serpico, ClaudioUniversity NaplesUNSPECIFIEDUNSPECIFIED
Hellwig, OlavTU ChemnitzUNSPECIFIEDUNSPECIFIED
Wegrowe, Jean-EricEcole PolytechnicUNSPECIFIEDUNSPECIFIED
Gensch, MichaelDLR, Institut für Optische Sensorsysteme/Technische Universität BerlinUNSPECIFIEDUNSPECIFIED
Bonetti, StefanoStockholm UniversityUNSPECIFIEDUNSPECIFIED
Date:2020
Journal or Publication Title:Nature Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1038/s41567-020-01040-y
Page Range:pp. 1-6
Publisher:Nature Publishing Group
ISSN:1745-2473
Status:Published
Keywords:Spindynamik, Magnetismus, THz diagnostik
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Vorhaben OptoRob (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Gensch, Michael
Deposited On:19 Jan 2021 08:44
Last Modified:01 May 2021 03:00

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