Ba0.85Ca0.15Zr0.1Ti0.90O3/CoFe2O4/Ba0.85Ca0.15Zr0.1Ti0.90O3Nanoscale Composite Films with 2-2 Connectivity for Magnetoelectric Actuation

Bhat, Anantha P. and Joshi, Manish Chandra and Malladi, Sairam K and et al, . (2022) Ba0.85Ca0.15Zr0.1Ti0.90O3/CoFe2O4/Ba0.85Ca0.15Zr0.1Ti0.90O3Nanoscale Composite Films with 2-2 Connectivity for Magnetoelectric Actuation. ACS Applied Nano Materials. pp. 1-12. ISSN 2574-0970

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Abstract

Interfacial strain plays a vital role in determining the coupling strength between the magnetic and electrically ordered phases in magnetoelectric (ME) nanostructures. The interfacial strain and its gradient size in a polycrystalline trilayer ME composite with a specific microstructure were estimated by grazing incident X-ray diffraction (GI-XRD). The average interfacial strain was estimated to have a maximum value of ∼7%, and was found to be relaxed at a length scale of 25-35 nm away from the interface. The optimized gradient size estimated from the trilayer ME composite was utilized to fabricate multilayers with specific periodicities ("Δ") and tested for the inverse piezomagnetic effect to estimate the optimum periodicity required to have enhanced ME coupling. Multilayers with periodicity (∼40 nm) compared to multilayers with relaxed/partial interfacial strain exhibited ∼25 to 26% increment in piezoelectric coefficient (d33) in the presence of a magnetic field. The constraint imposed on polarization by interfacial strain reflects on the enhancement of stiffness and introduces a quicker linear response to the piezoelectric displacement. In contrast, the partially strained and/or strain-relaxed layers exhibited nonlinear responses in polarization switching. The linear piezoelectric displacement in these strain-engineered ME composites makes them a potential candidate for device applications like actuators and transducers. © 2022 American Chemical Society.

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IITH Creators:

IITH Creators	ORCiD
Malladi, Sairam K	https://orcid.org/0000-0002-0322-8137

Item Type:

Article

Additional Information:

The authors would like to thank Defence Research Development Organisation (Grant No: ERIP/ER/1400471/M/01/1702) for financial support, the DST-FIST Program (Grant no. SR/FST/ETI-421/2016) for Microstructural Characterization and Department of Science and Technology (Grant No: DST/SERB/EMR/2017/003159/MMM) for financial assistance to carryout switching studies on BCZT thin films.

Uncontrolled Keywords:

magnetoelectrics; multiferroic; piezomagnetism; pulsed laser deposition; strain engineering; thin films

Subjects:

Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

Ms Palak Jain

Date Deposited:

19 May 2023 11:59

Last Modified:

19 May 2023 11:59