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Enhancement of the magnetoelectric effect in doped BaTiO 3 nanoparticles
Author(s) -
Apostolov A. T.,
Apostolova I. N.,
Bahoosh S. G.,
Trimper S.,
Wesselinowa J. M.
Publication year - 2015
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201451752
Subject(s) - ferroelectricity , doping , materials science , dopant , ferromagnetism , nanoparticle , magnetization , condensed matter physics , polarization (electrochemistry) , ion , phase transition , nanotechnology , magnetic field , optoelectronics , dielectric , chemistry , physics , organic chemistry , quantum mechanics
Experimentally the polarization P and the magnetization M of BaTiO3 (BTO) nanoparticles are altered under doping with transition metals as Fe‐ions. Using a modified spin model for the magnetic and the ferroelectric part as well as the magnetoelectric coupling we have calculated the dependence of M and P on the Fe‐doping content in BTO nanoparticles. The ferroelectric and ferromagnetic phase transition temperatures, T c fe and T c fm , are likewise shifted due to doping. Owing to surface effects the influence of doping could be stronger compared to the bulk behavior. Whereas M and T c fm increase with increasing Fe‐ion concentration, P and T c fe decrease if the dopant concentration is enhanced.