Dipolar field effect on microwave oscillation in a domain wall spin-valve
arXiv:0910.2280 · doi:10.1109/TMAG.2009.2022337
Abstract
We examined dipolar field effects on the microwave generation in the domain wall spin-valve by solving simultaneously the Landau-Lifshitz-Gilbert and Zhang-Levy-Fert diffusion equations. By numerically analyzing dipolar field dependence, we showed that the microwave generation needs the dipole-dipole interaction for a 180 domain wall and the amplitude of the microwave voltage signal depends strongly on the exchange length. In order to design a microwave generator using the domain wall spin-valve with high efficiency, we propose that the materials with short exchange length are preferred.
4 pages, 4 figures
References in corpus (10)
- Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
- Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
- Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
- Theory of Current-Driven Domain Wall Motion: A Poorman's Approach
- Direct-Current Induced Dynamics in Co90Fe10/Ni80Fe20 Point Contacts
- Mechanisms of spin-polarized current-driven magnetization switching
- Geometrically constrained magnetic wall
- Current induced magnetization dynamics in current perpendicular to the plane spin valves
- Dynamics of a domain wall and spin-wave excitations driven by a mesoscopic current
- Simulation of current-induced microwave oscillation in geometrically confined domain wall