Synthesis and spectroscopic characterization of copper zinc aluminum nanoferrite particles
Data(s) |
05/06/2014
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Resumo |
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. |
Formato |
application/pdf |
Identificador | |
Publicador |
Elsevier BV |
Relação |
http://eprints.qut.edu.au/69751/4/69751.pdf http://www.sciencedirect.com/science/article/pii/S1386142514002133 DOI:10.1016/j.saa.2014.02.026 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. |
Direitos |
Copyright 2014 Elsevier B.V. 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 |
Fonte |
School of Chemistry, Physics & Mechanical Engineering; Science & Engineering Faculty |
Palavras-Chave | #030606 Structural Chemistry and Spectroscopy #Copper doped zinc aluminum ferrite #Synthesis solid state reaction route #XRD #EPR #TEM #Tetragonal symmetry |
Tipo |
Journal Article |