Electric-field control of electromagnon propagation and spin-wave injection in a spiral multiferroic/ferromagnet composite

Journal Article · Wed Jan 28 00:00:00 EST 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4906520· OSTI ID:22412993

Chen, Hong-Bo ^[1]; Li, You-Quan ^[2]; Berakdar, Jamal ^[1]

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1. Institut für Physik, Martin-Luther Universität Halle-Wittenberg, D-06120 Halle (Germany)
2. Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027 (China)

We consider theoretically a composite chain consisting of a multiferroic helimagnet coupled to a conventional ferromagnet and inspect the conversion of electromagnon excitation into spin waves and vice versa. We demonstrate an electric-field control of spin-wave injection realized by electrically exciting an electromagnon that propagates with an intrinsic frequency larger than the gap of the spin wave in the ferromagnet. The efficiency of the conversion of the electromagnon into spin waves depends strongly on the strength of the magnetoelectric coupling at the interface and the intrinsic frequency of the multiferroic helimagnets. The phenomena predicted here suggest that a multiferroic/ferromagnet composite offers new opportunities for spin-wave injection, conversion, and control using electric field.

• OSTI ID: 22412993
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPOSITE MATERIALS
CONVERSION
COUPLING
EFFICIENCY
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
EXCITATION
FERROMAGNETIC MATERIALS
FERROMAGNETISM
INTERFACES
MAGNETIC PROPERTIES
MAGNONS
SPIN WAVES