Enhanced electric and magnetic properties in LCMO/BTO bilayer deposited by Pulsed Laser Deposition

21st Latin American Symposium on Solid State Physics

Ordoñez, J.E.^1 ; Gomez, M.E.^1 ; Lopera, W.^1 ; Prieto, P.^1,2

Department of Physics, Universidad Del Valle, A. A. 25360 Cali, Colombia^1

Centro de Excelencia en Nuevos Materiales-CENM, Universidad Del Valle, A. A. 25360 Cali, Colombia^2

关键词: Ferroelectric layers;    Ferromagnetic behaviour;    Growth parameters;    La2/3Ca1/3MnO3;    Magnetic layers;    Magnetoelectric couplings;    Substrate temperature;    Transport measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/480/1/012031/pdf
DOI  :  10.1088/1742-6596/480/1/012031

来源: IOP

【 摘 要 】

We have deposited bilayers of the FM La2/3Ca1/3MnO3and FE BaTiO3as a route to design systems with artificial magnetoelectric coupling. We have optimized the growth parameters for depositing LCMO/BTO/(001)Nb:STO by PLD at pure oxygen atmosphere and a substrate temperature of 820°C, keeping fixed the magnetic layer thickness (tLCMO∼50 nm) and varying the thickness of the ferroelectric layer (tBTO=17.8, 44.4, 98.4 nm). Magnetization and transport measurements indicate possible multiferroic behaviour in the bilayer. We found an increase in the Curie and metal-insulator transition temperature in the bilayer in comparison with those for LCMO (48nm)/STO. Hysteresis loops on bilayers show ferromagnetic behaviour.