Electrical control of magnon propagation in multiferroic BiFeO3 films

Details Electrical control of magnon propagation in multiferroic BiFeO3 films Electrical control of magnon propagation in multiferroic BiFeO3 films

2008-01-19

arxiv.org/abs/0801.3012v1

Appl. Phys. Lett. 92, 022514 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1063/1.2835704

The spin wave spectra of multiferroic BiFeO3 films is calculated using a phenomenological Landau theory that includes magnetostatic effects. The lowest frequency magnon dispersion is shown to be quite sensitive to the angle between spin wave propagation vector and the Neel moment. Since electrical switching of the Neel moment has recently been demonstrated in this material, the sensitivity of the magnon dispersion permits direct electrical switching of spin wave propagation. This effect can be used to construct spin wave logical gates without current pulses, potentially allowing reduced power dissipation per logical operation.

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