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

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.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [1]
  1. Institut für Physik, Martin-Luther Universität Halle-Wittenberg, D-06120 Halle (Germany)
  2. (China)
  3. Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027 (China)
Publication Date:
OSTI Identifier:
22412993
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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