Influence of Cr substitution on Debye-Waller factor and related structural parameters of ZnFe2-xCrxO4spinels

Kadhim A.M. Khalaf; A. D. Al Rawas; A. M. Gismelssed; Ahmed Al Jamel; Salwan K.J. Al Ani; M. S. Shongwe; K. O. Al Riyami; S. R. Al Alawi

doi:10.1016/j.jallcom.2017.01.083

Influence of Cr substitution on Debye-Waller factor and related structural parameters of ZnFe_2-xCr_xO₄spinels

Kadhim A.M. Khalaf^*, A. D. Al Rawas, A. M. Gismelssed, Ahmed Al Jamel, Salwan K.J. Al Ani, M. S. Shongwe, K. O. Al Riyami, S. R. Al Alawi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

The influence of Cr³⁺ions on the Debye-Waller factor and other related structural parameters of the polycrystalline ZnFe_2-xCr_xO₄(0.0 ≤ x ≤ 2.0) system was characterized at room temperature using the XRD, TEM, SEM and infrared (FT-IR) spectroscopy tools. X-ray diffraction results confirm the FCC spinel structure. Values of the lattice constant ‘a’ were found to decrease from 8.4370 Å for ZnFe₂O₄ferrites to 8.3208 Å for ZnCr₂O₄chromates. The structure factors for the (hkl) planes were calculated and used to estimate the intensity of the X-ray diffractions and the cation distributions among the tetrahedral and octahedral sites. The Debye-Waller factors were used to estimate the Debye effective temperatures, the mean square displacements and Debye frequencies of these spinels. The FT-IR spectra were characterized by two main absorption bands υ₁and υ₂in the frequency range of (400–1000) cm⁻¹. These bands are caused by stretching vibrations at the tetrahedral (A) and octahedral (B) sites respectively. The scanning electron microscope (SEM) and transmission electron microscope (TEM) micrographs revealed aggregates of stacked grains.

Original language	English
Pages (from-to)	474-486
Number of pages	13
Journal	Journal of Alloys and Compounds
Volume	701
DOIs	https://doi.org/10.1016/j.jallcom.2017.01.083
Publication status	Published - 2017

Keywords

Debye-Waller factor
FT-IR
SEM
Structure factor
TEM
XRD
ZnFeCrOspinels

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2017.01.083

Cite this

@article{168d32fc6d39425d9ee30efe7739dac3,

title = "Influence of Cr substitution on Debye-Waller factor and related structural parameters of ZnFe2-xCrxO4spinels",

abstract = "The influence of Cr3+ions on the Debye-Waller factor and other related structural parameters of the polycrystalline ZnFe2-xCrxO4(0.0 ≤ x ≤ 2.0) system was characterized at room temperature using the XRD, TEM, SEM and infrared (FT-IR) spectroscopy tools. X-ray diffraction results confirm the FCC spinel structure. Values of the lattice constant {\textquoteleft}a{\textquoteright} were found to decrease from 8.4370 {\AA} for ZnFe2O4ferrites to 8.3208 {\AA} for ZnCr2O4chromates. The structure factors for the (hkl) planes were calculated and used to estimate the intensity of the X-ray diffractions and the cation distributions among the tetrahedral and octahedral sites. The Debye-Waller factors were used to estimate the Debye effective temperatures, the mean square displacements and Debye frequencies of these spinels. The FT-IR spectra were characterized by two main absorption bands υ1and υ2in the frequency range of (400–1000) cm−1. These bands are caused by stretching vibrations at the tetrahedral (A) and octahedral (B) sites respectively. The scanning electron microscope (SEM) and transmission electron microscope (TEM) micrographs revealed aggregates of stacked grains.",

keywords = "Debye-Waller factor, FT-IR, SEM, Structure factor, TEM, XRD, ZnFeCrOspinels",

author = "Khalaf, {Kadhim A.M.} and {Al Rawas}, {A. D.} and Gismelssed, {A. M.} and {Al Jamel}, Ahmed and {Al Ani}, {Salwan K.J.} and Shongwe, {M. S.} and {Al Riyami}, {K. O.} and {Al Alawi}, {S. R.}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.jallcom.2017.01.083",

language = "English",

volume = "701",

pages = "474--486",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Influence of Cr substitution on Debye-Waller factor and related structural parameters of ZnFe2-xCrxO4spinels

AU - Khalaf, Kadhim A.M.

AU - Al Rawas, A. D.

AU - Gismelssed, A. M.

AU - Al Jamel, Ahmed

AU - Al Ani, Salwan K.J.

AU - Shongwe, M. S.

AU - Al Riyami, K. O.

AU - Al Alawi, S. R.

PY - 2017

Y1 - 2017

N2 - The influence of Cr3+ions on the Debye-Waller factor and other related structural parameters of the polycrystalline ZnFe2-xCrxO4(0.0 ≤ x ≤ 2.0) system was characterized at room temperature using the XRD, TEM, SEM and infrared (FT-IR) spectroscopy tools. X-ray diffraction results confirm the FCC spinel structure. Values of the lattice constant ‘a’ were found to decrease from 8.4370 Å for ZnFe2O4ferrites to 8.3208 Å for ZnCr2O4chromates. The structure factors for the (hkl) planes were calculated and used to estimate the intensity of the X-ray diffractions and the cation distributions among the tetrahedral and octahedral sites. The Debye-Waller factors were used to estimate the Debye effective temperatures, the mean square displacements and Debye frequencies of these spinels. The FT-IR spectra were characterized by two main absorption bands υ1and υ2in the frequency range of (400–1000) cm−1. These bands are caused by stretching vibrations at the tetrahedral (A) and octahedral (B) sites respectively. The scanning electron microscope (SEM) and transmission electron microscope (TEM) micrographs revealed aggregates of stacked grains.

AB - The influence of Cr3+ions on the Debye-Waller factor and other related structural parameters of the polycrystalline ZnFe2-xCrxO4(0.0 ≤ x ≤ 2.0) system was characterized at room temperature using the XRD, TEM, SEM and infrared (FT-IR) spectroscopy tools. X-ray diffraction results confirm the FCC spinel structure. Values of the lattice constant ‘a’ were found to decrease from 8.4370 Å for ZnFe2O4ferrites to 8.3208 Å for ZnCr2O4chromates. The structure factors for the (hkl) planes were calculated and used to estimate the intensity of the X-ray diffractions and the cation distributions among the tetrahedral and octahedral sites. The Debye-Waller factors were used to estimate the Debye effective temperatures, the mean square displacements and Debye frequencies of these spinels. The FT-IR spectra were characterized by two main absorption bands υ1and υ2in the frequency range of (400–1000) cm−1. These bands are caused by stretching vibrations at the tetrahedral (A) and octahedral (B) sites respectively. The scanning electron microscope (SEM) and transmission electron microscope (TEM) micrographs revealed aggregates of stacked grains.

KW - Debye-Waller factor

KW - FT-IR

KW - SEM

KW - Structure factor

KW - TEM

KW - XRD

KW - ZnFeCrOspinels

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