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Effects of exchange interactions on magnetoacoustic resonance in layered nanocomposites of yttrium iron garnet and lead zirconate titanate

Published online by Cambridge University Press:  31 January 2011

O.V. Ryabkov ,
S.V. Averkin ,
M.I. Bichurin ,
V.M. Petrov  and
G. Srinivasan
O.V. Ryabkov
Affiliation:
Institute of Electronic and Information Systems, Novgorod State University, 173003 Veliky Novgorod, Russia
S.V. Averkin
Affiliation:
Institute of Electronic and Information Systems, Novgorod State University, 173003 Veliky Novgorod, Russia
M.I. Bichurin
Affiliation:
Institute of Electronic and Information Systems, Novgorod State University, 173003 Veliky Novgorod, Russia
V.M. Petrov
Affiliation:
Physics Department, Oakland University, Rochester, Michigan 48309
G. Srinivasan*
Affiliation:
Physics Department, Oakland University, Rochester, Michigan 48309
*
a)Address all correspondence to this author. e-mail: srinivas@oakland.edu
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Abstract

In ferrite–piezoelectric bilayers, the magnetoelectric (ME) interaction is mediated by mechanical strain. The ME coupling is expected to be strong, particularly when the magnetic and electric subsystems show resonance. Here we address the effect of magnetic exchange interactions on ME coupling at magnetoacoustic resonance (MAR), i.e., at the coincidence of electromechanical resonance in the piezoelectric phase and ferromagnetic resonance in a tangentially magnetized ferrite. When exchange is ignored, the estimated ME coefficient versus frequency profile shows a giant magnetoelectric coefficient at MAR, about 75–100 V/cm Oe for yttrium–iron garnet (YIG)/lead zirconate–titanate (PZT) nano bilayers. The magnetic exchange is predicted to enhance the coupling at MAR and produce a secondary peak due to the excitation of magnetoacoustic modes. Estimates of the ME coefficient are provided as a function of thickness ratio of YIG and PZT.

Keywords

PiezoelectricFerromagneticNanoscale
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 8 , August 2007 , pp. 2174 - 2178
Copyright
Copyright © Materials Research Society 2007

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References

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