Search results for "Domain wall dynamics"

showing 2 items of 2 documents

Dynamics of noncollinear antiferromagnetic textures driven by spin current injection

2019

We present a theoretical formalism to address the dynamics of textured, noncolliear antiferromagnets subject to spin current injection. We derive sine-Gordon type equations of motion for the antiferromagnets, which are applicable to technologically important antiferromagnets such as Mn3Ir and Mn3Sn, and enables an analytical approach to domain wall dynamics in those materials. We obtain the expression for domain wall velocity, which is estimated to reach around 1 km/s in Mn3Ir by exploiting spin Hall effect with electric current density around 10^11A/m^2.

PhysicsCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale PhysicsFOS: Physical sciences02 engineering and technologySpin current021001 nanoscience & nanotechnology01 natural sciencesFormalism (philosophy of mathematics)Mesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesSpin Hall effectAntiferromagnetismCondensed Matter::Strongly Correlated ElectronsDomain wall dynamics010306 general physics0210 nano-technology
researchProduct

Combined effect of magnetic field and charge current on antiferromagnetic domain-wall dynamics

2017

We theoretically examine a cross effect of magnetic field and charge current on antiferromagnetic domain wall dynamics. Since antiferromagnetic materials are largely insensitive to external magnetic fields in general, charge current has been shown recently as an alternative and efficient way to manipulate antiferromagnets. We find a new role of the magnetic field in the antiferromagnetic dynamics that appears when it is combined with charge current, demonstrating a domain wall motion in the presence of both field and current. We show that a spatially varying magnetic field can shift the current-driven domain-wall velocity, depending on the domain-wall structure and the direction of the fiel…

PhysicsCondensed matter physicsField (physics)Dynamics (mechanics)Charge current02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesMagnetic field0103 physical sciencesAntiferromagnetismCondensed Matter::Strongly Correlated ElectronsDomain wall dynamicsWall motionCurrent (fluid)010306 general physics0210 nano-technologyPhysical Review B
researchProduct