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Title: Cation distribution in Ni–Cu–Zn nanoferrites from {sup 57}Fe in-field Mössbauer spectra

Highlights: • Occupancy of copper ions at about 20% towards tetrahedral sites. • Distribution is proposed on the basis of % of Fe ions at both A and B sites. • Distribution is checked by estimating the theoretical lattice constant values. - Abstract: The nanoparticles of Ni{sub 1−x}Cu{sub x}Zn{sub 0.35}Fe{sub 2}O{sub 4} were synthesized by sol–gel method using polyvinyl alcohol as a chelating agent. X-ray diffraction patterns of all the samples confirmed the single phase spinel structure. The site occupancy of copper in the nanosized nickel–zinc ferrite spinels was investigated with the help of in-field Mössbauer spectroscopy. Cation distribution for the whole series of compositions was proposed by considering the amounts of iron ions present at both tetrahedral and octahedral interstitial sites in the spinel lattice. Confirmation of the proposed distributions was done by estimating quantitatively the lattice parameters for these compositions and comparing their values with those of the experimentally observed ones.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4]
  1. Department of Physics, GITAM University, Visakhapatnam 530045 (India)
  2. Department of Physics, RGUKT, IIIT, Nuzvid 521201 (India)
  3. Department of Physics, BVB Vivekanada College, Sainikpuri, Secunderabad 500094 (India)
  4. UGC-DAE-CSR, Indore 452001 (India)
Publication Date:
OSTI Identifier:
22420599
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 59; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; CATIONS; COMPARATIVE EVALUATIONS; CONCENTRATION RATIO; COPPER COMPOUNDS; COPPER IONS; FERRITES; IRON 57; IRON IONS; LATTICE PARAMETERS; MOESSBAUER EFFECT; NANOPARTICLES; NANOSTRUCTURES; NICKEL COMPOUNDS; PVA; SOL-GEL PROCESS; SPINELS; X-RAY DIFFRACTION; ZINC COMPOUNDS