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Crystal Lattice Dynamics of the Substitutional Solid Solutions in the Bi(Gd) - Fe - O and Bi(Nd) - Fe - O Systems

Published online by Cambridge University Press:  22 May 2018

Valery Sobol ,
Barys Korzun ,
Cheslav Fedorcov ,
Olga Mazurenko ,
Temirkhan Bizhigitov ,
Sabit Tomaev ,
Bibara Nushnimbaeva ,
Sofia Egemberdieva  and
Altynbek Nauryzbaev
Valery Sobol
Affiliation:
Belarusian State Pedagogical University, 18 Sovetskaya St., Minsk 220030, Belarus
Barys Korzun*
Affiliation:
The City University of New York, Borough of Manhattan Community College, 199 Chambers St., New York, NY 10007, U.S.A.
Cheslav Fedorcov
Affiliation:
Belarusian State Pedagogical University, 18 Sovetskaya St., Minsk 220030, Belarus
Olga Mazurenko
Affiliation:
Belarusian Republican Foundation for Fundamental Research, 66 Nezavisimosti Ave., Minsk 220072, Belarus
Temirkhan Bizhigitov
Affiliation:
Taraz State Pedagogical University, 62 Tole bi St., Taraz 080001, Kazakhstan
Sabit Tomaev
Affiliation:
Taraz State Pedagogical University, 62 Tole bi St., Taraz 080001, Kazakhstan
Bibara Nushnimbaeva
Affiliation:
Taraz State Pedagogical University, 62 Tole bi St., Taraz 080001, Kazakhstan
Sofia Egemberdieva
Affiliation:
Taraz State Pedagogical University, 62 Tole bi St., Taraz 080001, Kazakhstan
Altynbek Nauryzbaev
Affiliation:
Taraz State Pedagogical University, 62 Tole bi St., Taraz 080001, Kazakhstan
*
*(Email: bkorzun@bmcc.cuny.edu)
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Abstract

The substitutional solid solutions in the Bi(Gd) - Fe - O and Bi(Nd) - Fe - O systems of the Bi1-xGdxFeO3 and Bi1-xNdxFeO3 types with x up to 0.20 were synthesized by the solid-state reaction method and investigated using X-ray diffraction analysis and infrared reflective spectrometry in the wavelength range from 12.5 to 24 μm. It was determined that the Bi1-xGdxFeO3 and Bi1-xNdxFeO3 crystal structure is a distorted form of perovskite, R3c space group. Two extremums at 18.2 μm (strong extremum) and 22.5 μm (rather weak extremum) on the infrared reflection spectra of the Bi1-xGdxFeO3 and Bi1-xNdxFeO3 solid solutions were discovered. The extremum at 18.2 μm corresponds to the Fe – O stretching vibrations and the extremum at 22.5 μm corresponds to the O - Fe – O bending vibrations of the FeO6 groups. The growth of reflectivity of the Bi1-xGdxFeO3 and Bi1-xNdxFeO3 solid solutions in comparison with pure BiFeO3 and the displacement of the reflectivity band maximum into the side of the spectrum with longer wavelengths with the increase of the atomic part of the substitutive element x up to 0.20 were found.

Keywords

chemical substitutionx-ray diffraction (XRD)infrared (IR) spectroscopy
Type
Articles
Information
MRS Advances , Volume 3 , Issue 55: Energy Materials and Technologies , 2018 , pp. 3243 - 3248
Copyright
Copyright © Materials Research Society 2018 

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