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Applied Physics Letters / Volume 99 / Issue 6 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 99, 063108 (2011); http://dx.doi.org/10.1063/1.3624900 (3 pages)

Hybrid spintronics and straintronics: A magnetic technology for ultra low energy computing and signal processing

Kuntal Roy1, Supriyo Bandyopadhyay1, and Jayasimha Atulasimha2

1Department of Electrical and Computer Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, USA
2Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, USA

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(Received 11 January 2011; accepted 25 July 2011; published online 9 August 2011)

The authors show that the magnetization of a 2-phase magnetostrictive/piezoelectric multiferroic single-domain shape-anisotropic nanomagnet can be switched with very small voltages that generate strain in the magnetostrictive layer. This can be the basis of ultralow power computing and signal processing. With appropriate material choice, the energy dissipated per switching event can be reduced to ∼45 kT at room temperature for a switching delay of ∼100 ns and ∼70 kT for a switching delay of ∼10 ns, if the energy barrier separating the two stable magnetization directions is ∼32 kT. Such devices can be powered by harvesting energy exclusively from the environment without the need for a battery.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

electric domains, magnetic anisotropy, magnetic domains, magnetic switching, magnetoelectronics, magnetostriction, magnetostrictive devices, multiferroics, nanoelectronics, nanomagnetics, piezoelectric devices

PACS

  • 85.70.Ec

    Magnetostrictive, magnetoacoustic, and magnetostatic devices

  • 85.50.-n

    Dielectric, ferroelectric, and piezoelectric devices

  • 85.75.-d

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

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3624900

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. Salahuddin and S. Datta, Appl. Phys. Lett. 90, 093503 (2007)APPLAB000090000009093503000001.

    J. Atulasimha and S. Bandyopadhyay, Appl. Phys. Lett. 97, 173105 (2010)APPLAB000097000017173105000001.

    D. E. Nikonov, G. I. Bourianoff, G. Rowlands, and I. N. Krivorotov, J. Appl. Phys. 107, 113910 (2010)JAPIAU000107000011113910000001.


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