Walker solution for Dzyaloshinskii domain wall in ultrathin ferromagnetic films

Document Type

Article

Publication Date

3-18-2019

Abstract

We analyze the electric current and magnetic field driven domain-wall motion in perpendicularly magnetized ultrathin ferromagnetic films in the presence of interfacial Dzyaloshinskii-Moriya interaction and both out-of-plane and in-plane uniaxial anisotropies. We obtain exact analytical Walker-type solutions in the form of one-dimensional domain walls moving with constant velocity due to both spin-transfer torques and out-of-plane magnetic field. These solutions are embedded into a larger family of propagating solutions found numerically. Within the considered model, we find the dependencies of the domain-wall velocity on the material parameters and demonstrate that adding in-plane anisotropy may produce domain walls moving with velocities in excess of 500 m/s in realistic materials under moderate fields and currents.

Identifier

85063209972 (Scopus)

Publication Title

Physical Review B

External Full Text Location

https://doi.org/10.1103/PhysRevB.99.100403

e-ISSN

24699969

ISSN

24699950

Issue

10

Volume

99

Grant

57334897

Fund Ref

Tohoku University

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