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Title: Electric-field-induced spin wave generation using multiferroic magnetoelectric cells

In this work, we report on the demonstration of voltage-driven spin wave excitation, where spin waves are generated by multiferroic magnetoelectric (ME) cell transducers driven by an alternating voltage, rather than an electric current. A multiferroic element consisting of a magnetostrictive Ni film and a piezoelectric [Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}]{sub (1−x)}–[PbTiO{sub 3}]{sub x} substrate was used for this purpose. By applying an AC voltage to the piezoelectric, an oscillating electric field is created within the piezoelectric material, which results in an alternating strain-induced magnetic anisotropy in the magnetostrictive Ni layer. The resulting anisotropy-driven magnetization oscillations propagate in the form of spin waves along a 5 μm wide Ni/NiFe waveguide. Control experiments confirm the strain-mediated origin of the spin wave excitation. The voltage-driven spin wave excitation, demonstrated in this work, can potentially be used for low-dissipation spin wave-based logic and memory elements.
Authors:
; ; ; ; ; ; ; ;  [1] ; ; ;  [2] ;  [3]
  1. Department of Electrical Engineering, University of California, Los Angeles, California 90095 (United States)
  2. Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, California 90095 (United States)
  3. Department of Electrical Engineering, University of California, Riverside, California 92521 (United States)
Publication Date:
OSTI Identifier:
22293073
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 8; Other Information: (c) 2014 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; 74 ATOMIC AND MOLECULAR PHYSICS; ANISOTROPY; ELECTRIC CURRENTS; ELECTRIC FIELDS; ELECTRICAL PROPERTIES; EXCITATION; LEAD COMPOUNDS; MAGNETIC FIELDS; MAGNETIZATION; MAGNETOSTRICTION; OSCILLATIONS; PIEZOELECTRICITY; SPIN WAVES; TITANATES; TRANSDUCERS; WAVEGUIDES