Title :
The effect of A-site and B-site ion substitutions on the temperatures of ferroelectric and magnetic phase transitions in multiferroic PbFe0.5Nb0.5O3
Author :
Raevski, I.P. ; Kubrin, S.P. ; Raevskaya, S.I. ; Prosandeev, S.A. ; Malitskaya, M.A. ; Zakharov, Yu.N. ; Lutokhin, A.G. ; Titov, V.V. ; Sarychev, D.A. ; Sitalo, E.I. ; Blazhevich, A.V. ; Zakharchenko, I.N.
Author_Institution :
Phys. Dept., Southern Fed. Univ., Rostov on Don, Russia
Abstract :
In the present study we diluted either A- or B- sublattice of perovskite multiferroic PbFe0.5Nb0.5O3 (PFN) and studied the change of the magnetic and ferroelectric phase transition temperatures caused by such dilution. A-site substitutions (Ba, Ca) lead to the smearing of the permittivity-temperature maximum and lower its temperature Tm. Addition of Ti to PFN increases Tm, decreases the diffusion of permittivity maximum and lowers the temperature of the transition between rhombohedral (monoclinic) and tetragonal ferroelectric phases. Both A-site and B-site substitutions in PFN lead to lowering of its Neel temperature TN. However above a certain compositional threshold fast lowering of TN stops and a new magnetic state with comparatively high (~50 K) transition temperature becomes stable in a rather wide compositional range.
Keywords :
Mossbauer effect; Neel temperature; ferroelectric transitions; iron compounds; lead compounds; multiferroics; permittivity; solid solutions; titanium; A-site ion substitution; A-sublattice; B-site ion substitution; B-sublattice; Neel temperature; PbFe0.5Nb0.5O3:Ti; Ti addition; compositional threshold; dilution; ferroelectric phase transition temperature; magnetic phase transition temperature; magnetic state; permittivity maximum diffusion; permittivity-temperature maximum smearing; perovskite multiferroic PFN; rhombohedral ferroelectric phase; tetragonal ferroelectric phase; Barium; Ceramics; Dielectrics; Magnetoelectric effects; Solids; Temperature dependence; Temperature distribution; Mössbauer effect; lead iron niobate; multiferroics; phase transitions; solid solutions;
Conference_Titel :
Applications of Ferroelectrics (ISAF/PFM), 2011 International Symposium on and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4577-1162-6
Electronic_ISBN :
978-1-4577-1161-9
DOI :
10.1109/ISAF.2011.6014097
