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

Journal Article · Sun Sep 01 00:00:00 EDT 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.05.047· OSTI ID:22341795

Gurav, S. K. ^[1]; Kadam, R. H.; Patange, S. M.; Lohar, K. S. ^[2]; Mane, D. R. ^[3]

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1. Department of Physics, SMP Mahavidyalaya, Murum, Osmanabad, MS (India)
2. Materials Research Laboratory, Srikrishna Mahavidyalaya Gunjoti, Omerga, Osmanabad 413613, MS (India)
3. Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431004, MS (India)

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 ferrimagnetic 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.

• OSTI ID: 22341795
• Journal Information: Materials Research Bulletin, Vol. 48, 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); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

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