Spin-Transfer Torque in Helical Spin-Density Waves

Abstract

The current driven magnetisation dynamics of a helical spin-density wave is investigated. Expressions for calculating the spin-transfer torque of real systems from first principles density functional theory are presented. These expressions are used for calculating the spin-transfer torque for the spin spirals of Er and fcc Fe at two different lattice volumes. It is shown that the calculated torque induces a rigid rotation of the order parameter with respect to the spin spiral axis. The torque is found to depend on the wave vector of the spin spiral and the spin-polarisation of the Fermi surface states. The resulting dynamics of the spin spiral is also discussed.

6 pages 2 figures

References in corpus (7)

• Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
• Domain wall dynamics driven by adiabatic spin transfer torques
• Boltzmann Test of Slonczewski's Theory of Spin Transfer Torque
• Spin Transfer Torque for Continuously Variable Magnetization
• Microscopic Calculation of Spin Torques in Disordered Ferromagnets
• Current driven magnetization dynamics in helical spin density waves
• The quantum-mechanical basis of an extended Landau-Lifshitz-Gilbert equation for a current-carrying ferromagnetic wire

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• Frustrated Antiferromagnetic Triangular Lattice with Dzyaloshinskii-Moriya Interaction: Ground States, Spin Waves, Skyrmion Crystal, Phase Transition
• Helimagnetic thin films: surface reconstruction, surface spin-waves and magnetization
• Current-induced sliding motion in a helimagnet MnAu${}_2$
• Phase transition for a contact process with random slowdowns
• Out-of-plane nesting driven spin spiral in ultrathin Fe/Cu(001) films
• Partial phase transition and quantum effects in helimagnetic films under an applied magnetic field