Structural characterization on batio3/la2/3ca1/3mno3 bilayers deposited on nb:srtio3

In this work we have investigated structural properties of La2/3Ca1/3MnO3/BaTiO3 bilayers grown on Nb:SrTiO3 substrates. The films were deposited by pulsed laser deposition (PLD) technique at high-pressure oxygen atmosphere and at a substrate temperature of 820 °C. . We report here the effect of the thickness of the ferroelectric BaTiO3 layer on the structural properties of the ferromagnetic La2/3Ca1/3MnO3. We choose nominal thickness for the ferroelectric layer of 20, 50 and 100nm maintaining constant the ferromagnetic layer at 50 nm. The structural study in the bilayers by X-ray diffraction shows us that the Bragg angle of the La2/3Ca1/3MnO3 layer maintains the same position that that for a 50 nm-thick La2/3Ca1/3MnO3 layer,  whereas the position of the BaTiO3 peak shifts toward lower angles indicating that the BTO layer grew with more internal stress than that for the individual 50 nm-thick BaTiO3 film gown under identical parameters (oxygen pressure and substrate temperature 400 mTorr for La2/3Ca1/3MnO3 (LCMO) and 3.0 mTorr for BaTiO3 (BTO)).

• Autores: Ordoñez, John E.; Prieto, Pedro; Goméz, María E.; Lopera, Wilson
• Tipo de recurso: Article of journal
• Fecha de publicación: 2014
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/50922
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/50922; http://bdigital.unal.edu.co/44964/
• Palabra clave: multifunctional materials; multiferroic oxides; ferroelectricity; ferromagnetism; materiales multifuncionales; multiferroicos; óxidos; ferroelectricidad; ferromagnetismo
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional