Influence of an external mechanical strain on the character of the magneto-electric effect in epitaxial films of yttrium iron garnet

2006 ◽  
Vol 203 (8) ◽  
pp. 2007-2011 ◽  
Author(s):  
V. E. Koronovskyy
Keyword(s):  
Yttrium Iron Garnet ◽  
Mechanical Strain ◽  
Epitaxial Films ◽  
Yttrium Iron ◽  
Electric Effect ◽  
Iron Garnet

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

2007 ◽  
Vol 22 (8) ◽  
pp. 2174-2178 ◽  
Author(s):  
O.V. Ryabkov ◽  
S.V. Averkin ◽  
M.I. Bichurin ◽  
V.M. Petrov ◽  
G. Srinivasan
Keyword(s):  
Lead Zirconate Titanate ◽  
Yttrium Iron Garnet ◽  
Mechanical Strain ◽  
Exchange Interactions ◽  
Lead Zirconate ◽  
Yttrium Iron ◽  
Magnetic Exchange ◽  
Zirconate Titanate ◽  
Piezoelectric Phase ◽  
Iron Garnet

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.

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