Experimental Investigations of the Response of Strain-mediated Composite Multiferroic Structures
TITLE:
Experimental Investigations of the Response of Strain-mediated Composite Multiferroic Structures
DATE:
Friday, September 8th, 2017
TIME:
3:30 PM
LOCATION:
GMCS-314
SPEAKER:
Dr. George Youssef, Department of Mechanical Engineering at SDSU
ABSTRACT:
Composite multiferroic materials based on strain-mediated electromagnetic coupling
offer viable alternatives to intrinsic materials at room temperature, where the
latter are unstable or exhibit weak coupling. Strain-mediated electromagnetic
composites can be used in contactless sensing and actuation applications as well
as in wireless power transfer. In such composites, the magnetoelectric coupling
is based on the transduction of mechanical strain between laminated piezoelectric
and magnetostrictive layers. Thus, the mechanical interface and the geometry play
crucial roles in the response. The efficiency of the magnetoelectric coupling can
be characterized by measuring the converse magnetoelectric coupling coefficient.
Challenges arise in complex geometries due to magnetic anisotropy, magnetic shielding,
and magneto-crystalline anisotropy. The focus of this presentation is to review recent
experimental developments from the Experimental Mechanical Laboratory at SDSU in
characterizing the CME response of macroscale concentric composite multiferroic ring structure.
HOST:
Dr. Parag Katira
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