Current-induced modulation of interfacial Dzyaloshinskii-Moriya interaction

Abstract

The Dzyaloshinskii-Moriya (DM) interaction is an antisymmetric exchange interaction that is responsible for the emergence of chiral magnetism. The origin of the DM interaction, however, remains to be identified albeit the large number of studies reported on related effects. It has been recently suggested that the DM interaction is equivalent to an equilibrium spin current density originating from spin-orbit coupling, an effect referred to as the spin Doppler effect. The model predicts that the DM interaction can be controlled by spin current injected externally. Here we show that the DM exchange constant ($D$) in W/CoFeB based heterostructures can be modulated with external current passed along the film plane. At higher current, $D$ decreases with increasing current, which we infer is partly due to the adiabatic spin transfer torque. At lower current, $D$ increases linearly with current regardless of the polarity of current flow. The rate of increase in $D$ with the current density agrees with that predicted by the model based on the spin Doppler effect. These results imply that the DM interaction at the HM/FM interface partly originates from an equilibrium interface spin (polarized) current which can be modulated externally.

References in corpus (26)

• Spin torque switching with the giant spin Hall effect of tantalum
• New Perspectives for Rashba Spin-Orbit Coupling
• Current-driven dynamics of chiral ferromagnetic domain walls
• Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
• Symmetry and magnitude of spin-orbit torques in ferromagnetic heterostructures
• Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
• Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction
• Layer thickness dependence of the current induced effective field vector in Ta|CoFeB|MgO
• Anatomy of Dzyaloshinskii-Moriya Interaction at Co/Pt Interfaces
• Interface control of the magnetic chirality in CoFeB|MgO heterosctructures with heavy metal underlayers
• Interface-generated spin currents
• Domain wall tilting in the presence of the Dzyaloshinskii-Moriya interaction in out-of-plane magnetized magnetic nanotracks
• Giant room temperature interface spin Hall and inverse spin Hall effects
• The nature of domain walls in ultrathin ferromagnets revealed by scanning nanomagnetometry
• Hund's rule-driven Dzyaloshinskii-Moriya interaction at 3d-5d interfaces
• Chirality from interfacial spin-orbit coupling effects in magnetic bilayers
• Berry phase theory of Dzyaloshinskii-Moriya interaction and spin-orbit torques
• Doppler shift picture of the Dzyaloshinskii--Moriya interaction
• Probing the Dzyaloshinskii-Moriya interaction in CoFeB ultrathin films using domain wall creep and Brillouin light spectroscopy
• Interfacial Dzyaloshinskii-Moriya interaction in Ta\Co20Fe60B20\MgO nanowires
• Effective gauge field theory of spintronics
• Direct measurement of interfacial Dzyaloshinskii-Moriya interaction in X/CoFeB/MgO heterostructures with a scanning-NV magnetometer
• Exchange stiffness in ultrathin perpendicularly-magnetized CoFeB layers determined using spin wave spectroscopy
• Modification of Dzyaloshinskii-Moriya interaction stabilized domain wall chirality by driving currents
• Tunable inertia of chiral magnetic domain walls
• The relation of the Dzyaloshinskii-Moriya interaction to spin currents and to the spin-orbit field

Cited by in corpus (16)

• The chiral Hall effect in canted ferromagnets and antiferromagnets
• Electric field control of interfacial Dzyaloshinskii-Moriya interaction in Pt/Co/AlO${}_x$ thin films
• Chiral magnetism: a geometric perspective
• First Principles Calculation of Dzyaloshinskii-Moriya Interaction: A Green's function Approach
• Topological electric driving of magnetization dynamics in insulators
• Driving spin chirality by electron dynamics in laser-excited antiferromagnets
• Dynamical and current-induced Dzyaloshinskii-Moriya interaction: Role for damping, gyromagnetism, and current-induced torques in noncollinear magnets
• Exact dynamics of concurrence-based entanglement in a system of four spin-1/2 particles on a triangular ladder structure
• Spin orbit torque-driven motion of quasi-Bloch domain wall in perpendicularly magnetized W/CoFeB/MgO structure
• Effect of Magnetic Anisotropy and Gradient-Induced Dzyaloshinskii-Moriya Interaction on the Formation of Magnetic Skyrmions
• Entanglement dynamics and fractional quantum state transport in the spin-$\frac{1}{2}$ triangular plaquette
• Current controlled non-hysteresis magnetic switching in the ansence of magnetic field
• Dzyaloshinskii-Moriya spin density by skew scattering
• Interfacial Dzyaloshinskii-Moriya interaction in nonmagnetic/noncollinear-antiferromagnetic bilayers
• The dynamics of skyrmion shrinking
• Optical responses induced by spin gauge field at the second order