Observation of the Dzyaloshinskii-Moriya interaction via asymmetry in magnetization reversal

Due to its importance in future spintronic-based memory devices, the Dzyaloshinskii-Moriya interaction (DMI) has been under intense investigation recently. Yet the feasibility of developing straightforward DMI measurement methods, especially using quasi-static tools, is debatable. Here, we present t...

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Bibliographic Details
Published inJournal of physics. D, Applied physics Vol. 53; no. 46; pp. 465001 - 465007
Main Authors Ahmadi, Khadijeh, Jamilpanah, Loghman, Seyed Ebrahimi, Seyed Ali, Olyaee, Abbas, Tehranchi, Mohammad Mehdi, Mohseni, Seyed Majid
Format Journal Article
LanguageEnglish
Published IOP Publishing 11.11.2020
Subjects
anisotropic magnetoresistance
Brillouin light scattering
Dzyaloshinskii-Moriya interaction
magneto-optical Kerr effect
Py/Pt
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Summary:Due to its importance in future spintronic-based memory devices, the Dzyaloshinskii-Moriya interaction (DMI) has been under intense investigation recently. Yet the feasibility of developing straightforward DMI measurement methods, especially using quasi-static tools, is debatable. Here, we present the observation of a shifted, asymmetric magnetization reversal manifested by interfacial DMI (iDMI) via magnetoresistance (MR) measurements for the first time. A shifted asymmetric MR response results from iDMI in an ultrathin symmetric unpatterned [Ni80Fe20/Pt] ×10 multilayer stack. Moreover, to reveal the presence of iDMI, we have experimentally seen iDMI from nonreciprocity in spin-wave dispersion using Brillouin light-scattering. Also, as a previously developed quasi-static method, we compare the MR results with the magneto-optical Kerr effect with the observed MR results. Our findings open pathways towards direct observation of iDMI in magnetic multilayers.
Bibliography:JPhysD-124871.R1
ISSN:0022-3727
1361-6463
DOI:10.1088/1361-6463/aba971