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

Sergiy Cherepov, Pedram Khalili Amiri, Juan G. Alzate, Kin Wong, Mark Lewis, Pramey Upadhyaya, Jayshankar Nath, Mingqiang Bao, Alexandre Bur, Tao Wu, Gregory P. Carman, Alexander Khitun, Kang L. Wang

Research output: Contribution to journalArticlepeer-review

113 Citations (Scopus)

Abstract

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(Mg1/3Nb2/3)O3] (1-x)-[PbTiO3]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.

Original languageEnglish
Article number082403
JournalApplied Physics Letters
Volume104
Issue number8
DOIs
Publication statusPublished - 2014 Feb 24

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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