Preparation and Study of Strong Magnetoelectric Coupling on Multiferroic BaTiO₃/La_0.7Sr_0.3MnO₃ Bilayer Heterostructure

Abstract:

The BaTiO₃/La_0.7Sr_0.3MnO₃((BTO/LSMO) bilayer films had been epitaxially grown on (001) oriented LaAlO₃ (LAO) single crystal substrate by using pulsed laser deposition technique,. The measurements of electric and magnetic properties showed that the bilayer heterostructure possessed low dielectric constant (ε_r=263), high ferromagnetic curie temperature (T_c=317K), and natural ferromagnetic and ferroelectric properties. The magnetoelectric (ME) voltage coefficient for the bilayer heterostructures at room temperature was around 140 mV/cm.Oe, which is one magnitude order higher than others. The interface coupling parameter k between ferromagnetic and ferroelectric layers was 0.68.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 2015-2019
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.2015
• Online since: July 2011
• Authors: Ting Xian Li, Ming Zhang, Zhou Hu, Kuo She Li, Dun Bo Yu, Hui Yan
• Keywords: Ferroelectric/Ferromagnetic Bilayer Heterostructure, Interface Coupling Parameter, Magnetoelectric Effect, Pulsed Laser Deposition (PLD)

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