2009 APS March Meeting
Volume 54, Number 1
Monday–Friday, March 16–20, 2009;
Pittsburgh, Pennsylvania
Session W28: Focus Session: Device Applications of Multiferroic Structures
11:15 AM–2:15 PM,
Thursday, March 19, 2009
Room: 330
Sponsoring
Units:
FIAP DMP
Chair: Ichiro Takeuchi, University of Maryland
Abstract ID: BAPS.2009.MAR.W28.1
Abstract: W28.00001 : Multiferroic Microwave and Millimeter Wave Devices
11:15 AM–11:51 AM
Preview Abstract
Abstract
Author:
Gopalan Srinivasan
(Oakland University)
Layered composites of ferrites and ferroelectrics are
magneto-electric (ME)
multiferroics and are of interest for studies on the physics of ME
interactions and for novel signal processing devices. There are
two types of
interactions. (i) \textit{ME coupling in bound
ferrite-piezoelectrics:} An electric field E applied to the
composite produces a
mechanical deformation in the piezoelectric phase that in turn is
coupled to
the ferrite, resulting in a shift in the ferromagnetic resonance
field. The
strength of the interactions is measured from the FMR shifts.
(ii) \textit{ME interactions in unbound ferrite-ferroelectrics}:
This is
a proximity effect in which hybrid spin-electromagnetic waves are
formed. An
electric field applied to the ferroelectric will result in a
change in the
permittivity and a shift in the hybrid modes.
We performed studies on the nature of ME interactions at 1-110
GHz in
bilayers of epitaxial yttrium iron garnet (YIG) films, single
crystal spinel
ferrites or hexagonal ferrites and single crystal lead magnesium
niobate-lead titanate (PMN-PT) or polycrystalline lead zirconium
titanate
(PZT). A stripline structure or a cavity resonator was used.
Electric fields
effects were investigated on magnetostatic waves, uniform
precession modes
or hybrid modes in the ferrite. We found evidence for strong
microwave ME
coupling. The coupling strength has been found to be dependent on
magnetic
field orientation, the nature of piezoelectric coupling and
volume for both
phases [1].
The high frequency ME effect is of importance for dual electric
and magnetic
field tunable ferrite-ferroelectric devices. We will discuss the
design and
characterization of ME resonators, phase shifters, delay lines
and filters
[2]. The work is supported by grants from the Army Research
Office and the office of Naval Research.
\\[4pt]
[1] ``Multiferroic magnetoelectric composites: Historical
perspective,
status, and future direction,'' Ce-Wen Nan, M. I. Bichurin, S.
Dong, D.
Viehland, and G. Srinivasan, J. Appl. Phys.\textbf{ 103},
031101 (2008).
\\[0pt]
[2] ``Magnetoelectric interactions in a
ferromagnetic-piezoelectric layered
structures: Phenomena and devices,'' M. I. Bichurin, D. Viehland
and G.
Srinivasan, J. Elec. Ceramics \textbf{19}, 243 (2007).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2009.MAR.W28.1