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Applied Physics Letters / Volume 101 / Issue 25 / MAGNETICS AND SPINTRONICS

Appl. Phys. Lett. 101, 252413 (2012); http://dx.doi.org/10.1063/1.4773214 (4 pages)

Magnetic power inverter: AC voltage generation from DC magnetic fields

Jun'ichi Ieda and Sadamichi Maekawa

Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan and CREST, Japan Science and Technology Agency, Tokyo 102-0075, Japan

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(Received 2 November 2012; accepted 10 December 2012; published online 21 December 2012)

We propose 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.

© 2012 American Institute of Physics

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KEYWORDS, PACS, and IPC

Keywords

ferromagnetic materials, invertors, magnetic devices, magnetic fields, magnetisation, nanomagnetics, nanowires, power conversion

PACS

  • 84.30.Qi

    Modulators and demodulators; discriminators, comparators, mixers, limiters, and compressors

  • 85.75.-d

    Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields

International Patent Classification (IPC)

  • B82B1/00

    Nano-structures

  • H01F13/00

    Apparatus or processes for magnetising or demagnetising

  • H01L27/20

    Including piezo-electric components; Including electrostrictive components; Including magnetostrictive components

  • H01L27/22

    Including components using galvano-magnetic effects, e.g. hall effect; Using similar magnetic field effects

  • H01L41/00

    Piezo-electric elements in general; Electrostrictive elements in general; Magnetostrictive elements in general; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof

  • H01L43/00

    Devices using galvano-magnetic or similar magnetic effects; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof

  • H02M

    Apparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems; Conversion of dc or ac input power into surge output power; Control or regulation thereof

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.4773214

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

    S. E. Barnes and S. Maekawa, Phys. Rev. Lett. 98, 246601 (2007).

    S. E. Barnes, J. Ieda, and S. Maekawa, Appl. Phys. Lett. 89, 122507 (2006)APPLAB000089000012122507000001.

    R. A. Duine, Phys. Rev. B 77, 014409 (2008).

    T. Koyama, D. Chiba, K. Ueda, H. Tanigawa, S. Fukami, T. Suzuki, N. Ohshima, N. Ishiwata, Y. Nakatani, and T. Ono, Appl. Phys. Lett. 98, 192509 (2011)APPLAB000098000019192509000001.

    Y. Yamane, J. Ieda, and S. Maekawa, Appl. Phys. Lett. 100, 162401 (2012)APPLAB000100000016162401000001.

    M. Yan, C. Andreas, A. Kákay, F. García-Sánchez, and R. Hertel, Appl. Phys. Lett. 99, 122505 (2011)APPLAB000099000012122505000001.


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