Domain Wall Motion Across Magnetic and Spin Compensation Points in Magnetic Garnets

M.V. Logunov, S.S. Safonov, A.S. Fedorov, A.A. Danilova, N.V. Moiseev, A.R. Safin, S.A. Nikitov, and A. Kirilyuk

Phys. Rev. Applied 15, 064024 – Published 9 June 2021

Abstract

Ferrimagnetic materials represent unique systems where the ease of manipulating the spins with applied magnetic fields is combined with exchange-driven acceleration of the internal spin dynamics. Of particular interest is the temperature range around the magnetic and spin compensation points, finely balancing both magnetic moment and angular momentum of the system, and leading to a very particular character of magnetic switching by the domain wall motion. Here we present our studies of the temperature-dependent domain wall dynamics in the temperature range covering both angular momentum and magnetization compensation points in garnet film, and reaching up to the Curie temperature. Drastic difference in the domain wall mobility and maximum achievable velocity in the vicinities of these two compensation points is demonstrated. Also a remarkably high mobility in weak applied magnetic fields is indicated.

Received 22 November 2020
Revised 3 May 2021
Accepted 14 May 2021

DOI:https://doi.org/10.1103/PhysRevApplied.15.064024

Physics Subject Headings (PhySH)

Domain walls Ferrimagnetism Magnetic domains Magnetic interactions Spin dynamics Spintronics

Thin films Transition metal oxides

Condensed Matter, Materials & Applied PhysicsNonlinear DynamicsGeneral Physics

Authors & Affiliations

M.V. Logunov¹, S.S. Safonov¹, A.S. Fedorov^1,2, A.A. Danilova^1,2, N.V. Moiseev³, A.R. Safin ^1,4, S.A. Nikitov ^1,2, and A. Kirilyuk^1,5,*

¹Kotel’nikov Institute of Radio-Engineering and Electronics of RAS, 11-7 Mokhovaya Street, Moscow 125009, Russia
²Moscow Institute of Physics and Technology, 9 Instituskij Pereulok, Dolgoprudny, Moscow Region 141701, Russia
³National Research Mordovia State University, 68 Bolshevistskaya Street, Saransk 430005, Russia
⁴Moscow Power Engineering Institute, 14 Krasnokazarmennaya Street, Moscow 111250, Russia
⁵FELIX Laboratory, Radboud University, Toernooiveld 7, 6525 ED Nijmegen, Netherlands

^*andrei.kirilyuk@ru.nl

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Vol. 15, Iss. 6 — June 2021

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