Title :
Local structure and dielectric behavior of Pb(Fe1/2Nb1/2)03-PbTiO3 single crystals
Author :
Xiao, Jingzhong ; Paixiao, José A. ; Costa, Maria M R ; Liu, Kui ; Zhang, Xinyi
Author_Institution :
Dept. of Phys., Univ. of Coimbra, Coimbra, Portugal
Abstract :
Pb(Fe1/2Nb1/2)O3-PbTiO3 (PFNT) is a multiferroic compound having electric and magnetic orders. To further explore the structural nature of ferroic characteristics in this material, the dielectric properties and structures of Pb(Fe1/2Nb1/2)1-xTixO3 (x=0.07 and 0.48) single crystals were investigated by a combination of temperature-dependent dielectric spectra, XRD, Raman and x-ray absorption fine-structure (XAFS) spectra. Both samples exhibit a frequency-dependent dielectric anomaly, which is significantly correlated to the local structure differences.
Keywords :
Raman spectra; X-ray diffraction; XANES; crystal structure; dielectric losses; lead compounds; multiferroics; permittivity; Pb(Fe0.5Nb0.5)O3-PbTiO3; Raman spectra; X-ray absorption fine-structure spectra; XAFS spectra; XRD; dielectric behavior; dielectric properties; electric orders; frequency-dependent dielectric anomaly; magnetic orders; multiferroic compound; single crystal local structure; structural nature; temperature-dependent dielectric spectra; Crystals; Dielectric constant; Iron; Temperature dependence; Temperature distribution; dielectric properties; local structure; multiferroics;
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.2012.6297763
