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Preparation and characterization of Bi 0.9 M 0.05 N 0.05 FeO 3 (M = Sm, Gd; N = Sr, Y) polycrystalline multiferroic compounds
Author(s) -
AlHaj M.
Publication year - 2010
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201000353
Subject(s) - multiferroics , crystallite , differential scanning calorimetry , analytical chemistry (journal) , impurity , chemistry , fourier transform infrared spectroscopy , materials science , ceramic , crystallography , ferroelectricity , physics , metallurgy , optoelectronics , organic chemistry , chromatography , dielectric , thermodynamics , quantum mechanics
Abstract The multiferroic compounds Bi 0.9 Gd 0.05 Sr 0.05 FeO 3 , Bi 0.9 Sm 0.05 Sr 0.05 FeO 3 , Bi 0.9 Gd 0.05 Y 0.05 FeO 3 , and Bi 0.9 Sm 0.05 Y 0.05 FeO 3 were prepared by the conventional ceramic method and were characterized by X‐ray diffraction, Fourier transform infrared spectroscopy, vibrating sample magnetometry, and differential scanning calorimetry. The compounds were found to have the rhombohedral perovskite‐like structure, accompanied by the existence of small amounts of Bi 2 Fe 4 O 9 and Bi 25 FeO 40 impurity phases. The appearance of weak ferromagnetism in Bi 0.9 Gd 0.05 Sr 0.05 FeO 3 and Bi 0.9 Sm 0.05 Sr 0.05 FeO 3 is due to partial destruction of the spiral spin structure due to lattice distortion and oxygen vacancies. The magnetic transition temperatures of the compounds are 360 °C and 355 °C, respectively. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)