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Title: The Effect of Ca–Zr mole ratio on preparation, structural and magnetic properties of Ca–Zr doped Bi-YIG

Graphical abstract: - Highlights: • Ca–Zr substituted Bi-YIG has been prepared via mechanochemical processing and heat treatment. • Structural and magnetic properties were investigated. • Magnetic measurements showed the Ferrimagnetic behavior for pure garnet structure samples. • The spherical morphology of the nanoparticles was found from the SEM micrograph. - Abstract: Ca–Zr substituted (Bi-YIG) nanopowders with a nominal composition of BiY{sub 2−x}Ca{sub x}Zr{sub y}Fe{sub 5−y}O{sub 12} (x = y and x varied from 0.00 to 1.25 by the step of 0.25) were prepared by mechanochemical processing (MCP) and subsequent heat treatments. The effect of dopant mol ratios, on garnet phase formation were investigated by X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. The lattice constant of the samples increased by increasing Zr{sup 4+} content (for x ≤ 1). Mean crystallite size of the single-phase powders, which was evaluated by Scherrer's formula, was about 35 nm. The experimental results show that the Ca–Zr substitution Bi-YIG lowers the calcining and sintering temperatures for x < 1. The results show that the single-phase nanopowders can be obtained at temperatures below 850 °C. The measurements of vibrating sample magnetometer (VSM) show that the saturation magnetization of the samples increases as x increase frommore » 0.00 to 0.25 and then decreases by increasing x to the values greater than 0.25.« less
Authors:
 [1] ; ;  [1] ;  [2]
  1. Department of Physics, Science and Research Branch, Islamic Azad University, Khouzestan (Iran, Islamic Republic of)
  2. Department of physics, Islamic Azad University, Najafabad Branch, Najafabad (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22341729
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 8; 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; DOPED MATERIALS; FERRITE GARNETS; FOURIER TRANSFORMATION; GARNETS; HEAT TREATMENTS; INFRARED SPECTRA; IRON OXIDES; LATTICE PARAMETERS; MAGNETIC PROPERTIES; MAGNETIZATION; NANOPARTICLES; NANOSTRUCTURES; POWDERS; SCANNING ELECTRON MICROSCOPY; X-RAY DIFFRACTION; YTTRIUM COMPOUNDS; ZIRCONIUM IONS