Magnetic control of polarization and ferroelastic strain switching in Terfenol-D/Bi12GeO20 laminate

Pan Yang; Song Peng; Xiaofei Wang; Xiaomei Lu; Feng Yan; Jinsong Zhu
February 2009
Applied Physics Letters;2/23/2009, Vol. 94 Issue 8, p082904
Academic Journal
A profound interplay between ferroelastic strain, polarization, and external magnetic field was observed in both bilayer and trilayer laminate Tb0.27–0.30Dy0.73–0.70Fe1.90–1.95 (Terfenol-D)/Bi12GeO20. The bilayer shows a much higher shear strain induced magnetoelectric effect than the trilayer. A series of experimental results related to the ferroelasticity in Bi12GeO20 such as a butterfly loop of the surface strain of Bi12GeO20 to magnetic field and a reproducible magnetic-field-induced strain switching were observed for the bilayer laminate.


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