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Title: Less magnetic and larger Zr{sup 4+}–Zn{sup 2+} ions co-substituted structural and magnetic properties of ordered Li{sub 0.5}Fe{sub 2.5}O{sub 4} nanoparticles

Graphical abstract: - Highlights: • Zr{sup 4+} and Zn{sup 2+} co-substituted Li{sub 0.5}Fe{sub 2.5}O{sub 4}. • Crystallite size decreased with Zr{sup 4+} and Zn{sup 2+} co-substitution. • Magnetization results exhibit collinear ferrimagnetic structure for x = 0.2. • Yafet–Kittle angle exists between the observed and calculated magneton number. - Abstract: Samples of Zr{sup 4+} and Zn{sup 2+} co-substituted Li{sub 0.5}Fe{sub 2.5}O{sub 4} nanoparticles were prepared by the sol–gel auto-combustion method. The samples were obtained by annealing at relatively low temperature at 600 °C and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM) and Fourier transform infrared (FT-IR) spectroscopy. Lattice parameter, X-ray density, specific surface area and porosity were found to increase, whereas bulk density and crystallite size showed the decreasing trend with the Zr{sup 4+} and Zn{sup 2+} substitution. Cation distribution estimated from XRD results suggests that Zn{sup 2+} and Li{sup +} occupy tetrahedral A- and octahedral B-site respectively, whereas Zr{sup 4+} and Fe{sup 3+} occupy both the available sites. The FT-IR spectra show two major absorption bands at 715–749 cm{sup −1} (ν{sub 1}) and 484–507 cm{sup −1} (ν{sub 2}) related to spinel structure of ferrite. Magnetization results exhibit collinear ferrimagneticmore » structure for x ≤ 0.2, and changed to the non-collinear for x > 0.2. Observed and calculated magneton number shows discrepancy in their values that gives rise to Yafet–Kittle angle for x > 0.2.« less
Authors:
 [1] ;  [2] ; ; ;  [3] ;  [4]
  1. Department of Physics, SMP Mahavidyalaya, Murum, Osmanabad, MS (India)
  2. Spin Device Technology Center, Faculty of Engineering, Shinshu University, Nagano 380-8553 (Japan)
  3. Materials Research Laboratory, Srikrishna Mahavidyalaya Gunjoti, Omerga, Osmanabad 413613, MS (India)
  4. Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431004, MS (India)
Publication Date:
OSTI Identifier:
22341795
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 9; Other Information: Copyright (c) 2013 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; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ABSORPTION SPECTROSCOPY; BULK DENSITY; CATIONS; FERRITE; FERRITES; FOURIER TRANSFORMATION; INFRARED SPECTRA; IRON IONS; LATTICE PARAMETERS; LITHIUM IONS; MAGNETIC PROPERTIES; NANOPARTICLES; SCANNING ELECTRON MICROSCOPY; SOL-GEL PROCESS; TRANSMISSION ELECTRON MICROSCOPY; X RADIATION; X-RAY DIFFRACTION; ZINC IONS; ZIRCONIUM IONS