Electric and Magnetic Properties of Multiferroic BiFeO and YMnO Thin Films

We grew rhombohedrally distorted BiFeO 3 and hexagonal YMnO 3 thin films on Pt/TiO 2 /SiO 2 /Si substrates via RF magnetron sputtering technique in a pure oxygen atmosphere. BiFeO 3 and YMnO 3 targets were self-made by the usual solid-state reaction method. We investigated the effects of deposition...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on magnetics 2008-11, Vol.44 (11), p.2895-2898
Main Authors: Zapata, J., Narvaez, J., Lopera, W., Gomez, M.E., Mendoza, G.A., Prieto, P.
Format: Article
Language:English
Subjects:
Atomic force microscopy
Atomic structure
Coercive force
Crystal structure
Crystallization
Ferroelectric and magnetic films
Ferroelectric films
Ferromagnetism
Hysteresis
Magnetic films
Magnetic properties
Magnetism
Magnetization
magnetoelectric materials
materials oxide thin films
Polarization
Saturation magnetization
Sputtering
Surface morphology
Surface topography
Thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We grew rhombohedrally distorted BiFeO 3 and hexagonal YMnO 3 thin films on Pt/TiO 2 /SiO 2 /Si substrates via RF magnetron sputtering technique in a pure oxygen atmosphere. BiFeO 3 and YMnO 3 targets were self-made by the usual solid-state reaction method. We investigated the effects of deposition temperature upon crystalline structure, surface morphology, magnetization, and electrical polarization of BiFeO 3 and YMnO 3 thin films. The crystalline structure was studied by X-ray diffraction, and the topography of film surface was analyzed by atomic force microscopy. We also conducted measurements of ferroelectric and ferromagnetic hysteresis loops to study the electrical and magnetic behavior of the samples. Polarization, as a function of electric field in capacitor structures based on our BiFeO 3 films, shows hysteretic behavior with a coercive field of 54 kV/cm and a remanent polarization of 21 muC/cm 2 ; whereas, YMnO 3 films show hysteretic behavior with coercive field of 2.4 kV/cm, remanent polarization of 1.2 muC/cm 2 , and saturation polarization of 3.5 mu C/cm 2 . Magnetization measurements of the BiFeO 3 films evidence weak ferromagnetism, that can be related to the presence of a small quantity of ferromagnetic impurities.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2008.2002473