Spin Density Waves and Domain Wall Interactions in Nanowires

Abstract

We investigated how the dynamics of a domain wall are affected by the presence of spin density waves in a ferromagnetic wire. Domain walls and other scattering centres can cause coherent spin density waves to propagate through a wire when a current is applied. In some cases the spin torque due to these scattered electrons can be enhanced such that it is on a par with the exchange and anisotropy energies controlling the shape and dynamics of the domain wall. In such a case we find that the spin density waves enhance the current induced domain wall motion, allowing for domain wall motion with smaller current pulses. Here we consider a system involving two domain walls and focus on how the motion of the second domain wall is modified by the spin density waves caused by the presence of the first domain wall.

7 pages, 6 figures, accepted for publication in Phys. Rev. B

References in corpus (10)

• Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
• Real-space observation of current-driven domain wall motion in submicron magnetic wires
• Electron transport through single Mn12 molecular magnets
• Resistivity due to a Domain Wall in Ferromagnetic Metal
• Signatures of Molecular Magnetism in Single-Molecule Transport Spectroscopy
• Very large magnetoresistance in lateral ferromagnetic (Ga,Mn)As wires with nanoconstrictions
• Minimization of Ohmic losses for domain wall motion in a ferromagnetic nanowire
• Electrons in a ferromagnetic metal with a domain wall
• Current-induced interactions of multiple domain walls in magnetic quantum wires
• Role of non-collinear magnetization: from ferromagnetic nano wires to quantum rings

Cited by in corpus (5)

• Shape of magnetic domain walls formed by coupling to mobile charges
• Indirect Interaction of Magnetic Domain Walls
• Negative differential magneto-resistance in ferromagnetic wires with domain walls
• Local spin transfer torque and magnetoresistance in domain walls with variable width
• Dynamics of the polarization of a pinned domain wall in a magnetic nanowire