Title :
Ferroelectric and magnetic properties of Fe-doped BaTiO3 thin films grown by the pulsed laser deposition
Author :
Ramana, E. Venkata ; Lee, B.W. ; Jung, C.U. ; Jung, Ranju ; Yang, S.M. ; Jung, M.H.
Author_Institution :
Dept. of Phys., Hankuk Univ. of Foreign Studies, Yongin, South Korea
Abstract :
Fe-doped BaTiO3 thin films were grown on (001) oriented SrTiO3 substrates using pulsed-laser deposition technique. These films had a single-phase character and good epitaxial relationship with the substrate. Polarization-electric field (P-E) hysteresis revealed a saturated polarization with a remnant polarization (Pr) of 13.5 μC/cm2 for 10 mol% Fe-doped BaTiO3 films. Further increase of composition resulted in the large leakage currents and reduction of polarization. The piezoelectric domain switching in the films was confirmed by local hysteresis using piezoelectric force microscopy measurements. The Fe-doped BaTiO3 thin films exhibited room temperature ferromagnetism, and the magnetization value increased with increasing Fe concentration. Our results demonstrated that the addition of Fe ≤10 mol% in BaTiO3 induce the ferromagnetism and the switchable ferroelectric state.
Keywords :
barium compounds; dielectric hysteresis; dielectric polarisation; doping profiles; electric domains; ferroelectric switching; ferroelectric thin films; ferromagnetic materials; iron; leakage currents; magnetic domains; magnetic epitaxial layers; magnetic hysteresis; multiferroics; piezoelectricity; pulsed laser deposition; remanence; (001) oriented SrTiO3 substrates; BaTiO3:Fe; SrTiO3; doping concentration; epitaxial relationship; ferroelectric properties; ferroelectric thin films; leakage currents; magnetic properties; magnetization value; multiferroic physical properties; piezoelectric domain switching; piezoelectric force microscopy; polarization reduction; pulsed laser deposition; remnant polarization; room temperature ferromagnetism; saturated polarization-electric field hysteresis; switchable ferroelectric state; temperature 293 K to 298 K; Epitaxial growth; Iron; Lattices; Magnetic hysteresis; Saturation magnetization; Substrates; epitaxial; ferroelectric; ferromagnetic; multiferroic; piezoresponse;
Conference_Titel :
Applications of Ferroelectrics held jointly with 2012 European Conference on the Applications of Polar Dielectrics and 2012 International Symp Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (ISAF/ECAPD/PFM), 2012 Intl Symp
Conference_Location :
Aveiro
Print_ISBN :
978-1-4673-2668-1
DOI :
10.1109/ISAF.2012.6297836
