Strain transfer in ferroelectric-ferrimagnetic magnetoelectric composite

Saha, S and Singh, RP and Liu, Y and Swain, AB and Kumar, A and Subramanian, V and Arockiarajan, A and Srinivasan, G and Ranjan, R and Ranjan, R (2021) Strain transfer in ferroelectric-ferrimagnetic magnetoelectric composite. In: Physical Review B, 103 (14).

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Abstract

We show that electrically poled ferroelectric matrix considerably enhances the localized magnetostrictive deformations in a ferroelectric-ferrimagnetic composite. Magnetostrain measurements performed on Dy-free and Dy-modified BiFeO3-PbTiO3 (BF-PT) ferroelectric ceramics revealed no measurable macroscopic strain in poled and unpoled Dy-free nonferromagnetic specimens. Dy-modified BF-PT, on the other hand, exhibit ferrimagnetic dysprosium-iron garnet (DyIG) as precipitates and exhibit a macroscopic strain of -4 ppm in the poled state. Despite the small (6) volume fraction of DyIG, the macroscopic strain in Dy-modified BF-PT is almost 50 of the strain of pure DyIG. Our results suggest that the amplification of the localized magnetostrictive deformation in the ferrimagnetic islands by the neighboring ferroelectric regions is caused by the magnetostrictive stress-induced motion of ferroelectric-ferroelastic domains of the poled ferroelectric matrix. © 2021 American Physical Society.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	American Physical Society
Additional Information:	The copyright for this article belongs to American Physical Society
Keywords:	Deformation; Ferrimagnetism; Ferroelectric ceramics; Lead titanate; Magnetostrictive devices, As precipitates; Ferroelastic domains; Macroscopic strains; Magnetoelectric composites; Magnetostrictive deformations; Non-ferromagnetic; Poled ferroelectrics; Strain transfer, Ferroelectricity
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	28 Jul 2021 10:32
Last Modified:	28 Jul 2021 10:32
URI:	http://eprints.iisc.ac.in/id/eprint/68932

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