Estimation of gradient size of interfacial strain and its optimization for effective magnetoelectric coupling in (CoFe2O4) – (0.93Na0.5Bi0.5TiO3 – 0.07BaTiO3), 2-2 nano-composites

Bhat, Anantha P. and Ramadurai, Ranjith (2022) Estimation of gradient size of interfacial strain and its optimization for effective magnetoelectric coupling in (CoFe2O4) – (0.93Na0.5Bi0.5TiO3 – 0.07BaTiO3), 2-2 nano-composites. Ceramics International, 48 (6). pp. 7622-7628. ISSN 0272-8842

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Abstract

Strain-mediated coupling between the magnetic and electrically ordered phases plays a significant role in magnetoelectric (ME) nano-composites. This study explores a method to analyse and quantify interfacial strain using a grazing angle scan (α) in a ME composite optimised for a specific microstructure. The details of strain around the interface CoFe2O4 (CFO) – 0.93Na0.5Bi0.5TiO3 – 0.07BaTiO3 (NBT-BT) was determined by performing ‘α’ scan, in order to gather information at various depths of the NBT-BT layer around maximum intensity (110) reflection. The strain around the interface was observed to dominate over a spatial region of ∼20–30 nm away from the interface. The Piezoresponse force microscopy (PFM) studies performed near the interface reveal that the strain constrain experienced by the ferroelectric layer operates such that polarisation rotation and domain wall motion are constrained compared to the strain relaxed region of the film. For effective strain transfer, heterostructures grown with optimised thicknesses (∼20–30 nm) exhibited a superior inverse piezomagnetic effect. © 2021 Elsevier Ltd and Techna Group S.r.l.

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IITH Creators:

IITH Creators	ORCiD
Ramadurai, Ranjith	http://orcid.org/0000-0003-2991-0027

Item Type:

Article

Additional Information:

The authors would like to thank Defence Research and Development Organisation (Grant No: ERIP/ER/1400471/M/01/1702 ) for the financial support and DST-FIST program (Grant no. SR/FST/ETI-421/2016 ).

Uncontrolled Keywords:

Ferroelectrics; Lead free piezoelectrics; Magnetoelectric multiferroics; Piezoresponse force microscopy

Subjects:

Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

22 Jul 2022 06:51

Last Modified:

22 Jul 2022 06:51