Apostolova, I. N., Apostolov, A. T., Golrokh Bahoosh, S., Wesselinowa, J. M.
Origin of ferromagnetism in transitionmetal doped BaTiO3
Journal of Applied Physics 113, (20),pp 203904/1-4 (2013)
We have calculated the temperature, magnetic field, and ion doping dependence of the magnetic and
electric properties in Fe-doped BaTiO3 using a microscopic model and the Green's function
technique. It is shown that the ferromagnetic and multiferroic properties observed at room
temperature in Fe-doped BaTiO3 could be due to the super exchange interactions between Fe3+ ions in different occupational sites associated with oxygen vacancies and to the exchange coupling of Fe ions with mixed valence, Fe3+ and Fe4+. There is a multiferroic region which depends strongly on the Fe-doping concentration.
TH-2013-44