Thermally driven domain wall motion in Fe on W(1 1 0)

Abstract

It has recently been shown that domain walls in ferromagnets can be moved in the presence of thermal gradients. In this work we study the motion of narrow domain walls in low-dimensional systems when subjected to thermal gradients. The system chosen is a monolayer of Fe on W(1 1 0) which is known to exhibit a large anisotropy while having a soft exchange, resulting in a very narrow domain wall. The study is performed by means of atomistic spin dynamics simulations coupled to first-principles calculations. By subjecting the systems to a thermal gradient we observe a temperature dependent movement of the domain wall as well as changes of the spatial magnetization profile of the system. The thermal gradient always makes the domain wall move towards the hotter region of the sample with a velocity proportional to the gradient. The material specific study is complemented by model simulations to discern the interplay between the thermal gradient, magnetic anisotropy and the exchange interaction, and shows that the larger DW velocities are found for materials with low magnetic anisotropy. The relatively slow DW motion of the Fe/W(1 1 0) system is hence primarily caused by its large magnetic anisotropy.

8 pages, 13 figures

References in corpus (7)

• Spin Transfer Torques
• Spin Seebeck insulator
• Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
• Asymmetric Spin-wave Dispersion on Fe(110): Direct Evidence of Dzyaloshinskii--Moriya Interaction
• Subatomic movements of a domain wall in the Peierls potential
• Domain wall heat conductance in ferromagnetic wires
• Relativistic and thermal effects on the magnon spectrum of a ferromagnetic monolayer

Cited by in corpus (11)

• Thermophoresis of an Antiferromagnetic Soliton
• Landau-Lifshitz theory of the thermomagnonic torque
• Topological spin transport by Brownian diffusion of domain walls
• Thermally induced magnonic spin current, thermomagnonic torques and domain wall dynamics in the presence of Dzyaloshinskii-Moriya interaction
• Domain wall magneto-Seebeck effect
• The inverse thermal spin-orbit torque and the relation of the Dzyaloshinskii-Moriya interaction to ground-state energy currents
• Thermal gradient driven domain wall dynamics
• Magnon-induced non-Markovian friction of a domain wall in a ferromagnet
• Gyrotropic elastic response of skyrmion crystals to current-induced tensions
• Accounting for Quantum Effects in Atomistic Spin Dynamics
• Role of shape anisotropy on thermal gradient-driven domain wall dynamics in magnetic nanowires