Electric control of spin wave modes at room temperature in BiFeO3
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Date
2012-02-01
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Institute of Physics
Abstract
Multiferroic materials present the rare case to exhibit simultaneously magnetic and ferroelectric orders in interaction. This interaction corresponds to the magnetoelectric coupling. Thereby, magnetoelectric materials can potentially be used to control spins by an external electric field. This feature seems promising in spintronics and in magnonics that use magnetic excitations (spin wave) for information processing. In BiFeO3, a room-temperature magnetoelectric material, the interaction between the ferroelectric and magnetic orders offers the opportunity to control spins with an electric field. We have detected by Raman scattering two species of spin propagation modes (magnon) in BiFeO3 single crystal: in-plane (phi mode) and modes out of the cycloidal plane (psi mode) [1,2]. The frequencies of these modes have been successfully compared to the results of a Ginzburg-Landau mode [3]. Our result shows that the magnon modes might be interpreted as electromagnon. In order to characterize the magnetoelectric coupling, an external electric field has been applied. We show that in BiFeO3, the spin-wave frequency can be tuned electrically by over 30%, in a non-volatile way and with virtually no power dissipation [4]. These results showed that BiFeO3 is a very promising material for the generation and the control of spin waves in the future magnonic devices.
Description
Keywords
Spin waves, Ambient temperature, Bismuth, Iron, Raman spectroscopy, Ferroelectric materials, Crystals, Dissipation factor, Magnons
Citation
Rovillain, P., de Sousa, R., Gallais, Y., Sacuto, A., Measson, M.-A., Colson, D., Forget, A., Bibes, M., Barthelemy, A., & Cazayous, M. (2012). Electric control of spin wave modes at room temperature in BiFeO3. Poster presented to the 36th Annual Condensed Matter and Materials Meeting, Wagga 2012, Charles Sturt University, Wagga Wagga, NSW, 31st January – 3rd February, 2012, (p. 72). Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2012/