Interaction of gapless spin waves and a domain wall in an easy-cone ferromagnet

Abstract

We theoretically study the interaction of spin waves and a domain wall in a quasi-one-dimensional easy-cone ferromagnet. The gapless spin waves on top of a domain wall are found to exhibit finite reflection in contrast to the well-known perfect transmission of gapful spin waves in easy-axis magnets. Based on the obtained scattering properties, we study the thermal-magnon-driven dynamics of a domain wall subjected to a thermal bias within the Landau-Büttiker formalism, where transmitted magnons are shown to exert the magnonic torque on the domain wall and thereby drive it with the velocity linear to the applied thermal bias. The peculiar gapless nature of spin waves in easy-cone magnets enables the thermally-driven domain-wall motion even at low temperatures, differing from the easy-axis case where the domain-wall velocity is exponentially suppressed at low temperatures. Our work suggests that easy-cone magnets can serve as a useful platform to study the interaction of gapless spin waves and nonlinear excitations and thereby realize low-temperature magnon-related phenomena.

arXiv comment6 pages, 3 figures

References in corpus (26)

• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
• Theory of Current-Driven Domain Wall Motion: A Poorman's Approach
• Dynamics of an Insulating Skyrmion under a Temperature Gradient
• All-magnonic spin-transfer torque and domain wall propagation
• Staggering antiferromagnetic domain wall velocity in a staggered spin-orbit field
• Magnon-skyrmion scattering in chiral magnets
• Magnetization transport and quantized spin conductance
• Theory of magnon-skyrmion scattering in chiral magnets
• Antiferromagnetic Domain Wall Motion Induced by Spin Waves
• Magnetic domain-wall motion by propagating spin waves
• Propulsion of a domain wall in an antiferromagnet by magnons
• Thermomagnonic spin transfer and Peltier effects in insulating magnets
• A thermodynamic theory for thermal-gradient-driven domain wall motion
• Angular and Linear Momentum of Excited Ferromagnets
• Spin-wave contributions to current-induced domain wall dynamics
• Spin wave assisted current induced magnetic domain wall motion
• Conserved momenta of a ferromagnetic soliton
• Bidirectional spin-wave-driven domain wall motion in antiferromagnetically coupled ferrimagnets
• Domain wall heat conductance in ferromagnetic wires
• Noise and dissipation in magnetoelectronic nanostructures
• Magnetic Domain Walls as Hosts of Spin Superfluids and Generators of Skyrmions
• Driving a magnetized domain wall in an antiferromagnet by magnons
• Domain wall dynamics in easy-cone magnets
• Interaction Between a Domain Wall and Spin Supercurrent in Easy-cone Magnets
• Atomic-Scale Spin-Wave Polarizer Based on a Sharp Antiferromagnetic Domain Wall