46 research outputs found
Spinmotive force due to motion of magnetic bubble arrays driven by magnetic field gradient
Interaction between local magnetization and conduction electrons is
responsible for a variety of phenomena in magnetic materials. It has been
recently shown that spin current and associated electric voltage can be induced
by magnetization that depends on both time and space. This effect, called
spinmotive force, provides for a powerful tool for exploring the dynamics and
the nature of magnetic textures, as well as a new source for electromotive
force. Here we theoretically demonstrate the generation of electric voltages in
magnetic bubble array systems subjected to a magnetic field gradient. It is
shown by deriving expressions for the electric voltages that the present system
offers a direct measure of phenomenological parameter that describes
non-adiabaticity in the current induced magnetization dynamics. This spinmotive
force opens a door for new types of spintronic devices that exploit the
field-gradient.Comment: accepted in Scientific Report
Continuous Generation of Spinmotive Force in a Patterned Ferromagnetic Film
We study, both experimentally and theoretically, the generation of a dc
spinmotive force. By exciting a ferromagnetic resonance of a comb-shaped
ferromagnetic thin film, a continuous spinmotive force is generated.
Experimental results are well reproduced by theoretical calculations, offering
a quantitative and microscopic understanding of this spinmotive force.Comment: 4 pages, 4 figures, accepted to Physical Review Letter