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Magnetic power inverter: AC voltage generation from DC magnetic fields
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Researchers have developed a method that allows power conversion from DC magnetic fields to AC electric voltages using domain wall (DW) motion in ferromagnetic nanowires. The device concept relies on spinmotive force, voltage generation due to magnetization dynamics. Sinusoidal modulation of the nanowire width introduces a periodic potential for a DW, the gradient of which exerts variable pressure on the traveling DW. This results in time variation of the DW precession frequency and the associated voltage. Using a one-dimensional model, we show that the frequency and amplitude of the AC outputs can be tuned by the DC magnetic fields and wire-design.
This is a new application of spintronics is the highly efficient and direct conversion of magnetic energy to electric voltage by using magnetic nanostructures and manipulating the dynamics of magnetization.
See more and subscribe to NextBigFuture at 2013-01-04 06:15:50 Source: http://nextbigfuture.com/2013/01/magnetic-power-inverter-ac-voltage.html
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