Synthesis and spectroscopic characterization of copper zinc aluminum nanoferrite particles
Lakshmi Reddy, S., Ravindra Reddy, T., Roy, Nivya, Philip, Reji, Montero, Ovidio Almanza, Endo, Tamio, & Frost, Ray L. (2014) Synthesis and spectroscopic characterization of copper zinc aluminum nanoferrite particles. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 127, pp. 361-369.
Copper doped zinc aluminium ferrites are synthesized by the solid-state reaction route is cubic crystalline with unit cell parameter varying from 8.39 to 8.89 Å. TEM pictures clearly indicating that fundamental unit is composed of octahedral and tetrahedral blocks and joined strongly shown in (a). EPR spectra is compositional dependent at lower Al/Cu concentration EPR spectra is due to Fe3+ and at a higher content of Al/Cu the EPR spectra is due to Cu2+. Absence of EPR spectra at room temperature indicates that the sample is perfectly ferromagnetic. EPR results at low temperature indicate that the sample is paramagnetic, and that copper is placed in the tetragonal elongation (B) site with magnetically non-equivalent ions in the unit cell having strong exchange coupling between them. This is shown in (b). (a) TEM image of ferrite with x = 0.15. (b) EPR spectrum of ferrite with x = 0.75.
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|Item Type:||Journal Article|
|Keywords:||Copper doped zinc aluminum ferrite, Synthesis solid state reaction route, XRD, EPR, TEM, Tetragonal symmetry|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2014 Elsevier B.V.|
|Copyright Statement:||NOTICE: this is the author’s version of a work that was accepted for publication in Spectrochimica Acta Part A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Spectrochimica Acta Part A, [Volume 127, (5 June 2014)] DOI: 10.1016/j.saa.2014.02.026|
|Deposited On:||03 Apr 2014 02:11|
|Last Modified:||05 Jun 2016 16:42|
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