Electric field control of interfacial Dzyaloshinskii-Moriya interaction in Pt/Co/AlOx thin films

•Electric field modifies the labyrinthine magnetic domain equilibrium width.•Dzyaloshinskii-Moriya interaction constant deduced from labyrinthine magnetic domain analysis depends on the choice of the exchange stiffness constant.•Strong electric field variation of magnetic parameters is related to th...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2021-02, Vol.520, p.167122, Article 167122
Main Authors: Schott, Marine, Ranno, Laurent, Béa, Hélène, Baraduc, Claire, Auffret, Stéphane, Bernand-Mantel, Anne
Format: Article
Language:English
Subjects:
Cobalt
Condensed Matter
Electric fields
Magnetic anisotropy
Magnetic domains
Magnetic properties
Magnetic saturation
Magnetism
Nucleation
Optical properties
Physics
Platinum
Stiffness
Thin films
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Summary:•Electric field modifies the labyrinthine magnetic domain equilibrium width.•Dzyaloshinskii-Moriya interaction constant deduced from labyrinthine magnetic domain analysis depends on the choice of the exchange stiffness constant.•Strong electric field variation of magnetic parameters is related to the proximity of the measurement temperature to the Curie temperature. We studied electric field modification of magnetic properties in a Pt/Co/AlOx trilayer via magneto-optical Kerr microscopy. We observed the spontaneous formation of labyrinthine magnetic domain structure due to thermally activated domain nucleation and propagation under zero applied magnetic field. A variation of the period of the labyrinthine structure under electric field is observed as well as saturation magnetization and magnetic anisotropy variations. Using an analytical formula of the stripe equilibrium width we estimate the variation of the interfacial Dzyaloshinskii-Moriya interaction under electric field as function of the exchange stiffness constant.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2020.167122