skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Tailoring the Structural, Optical and Magnetic Properties of NiFe{sub 2}O{sub 4} by Varying Annealing Temperature

Abstract

Magnetic nanocrystalline NiFe{sub 2}O{sub 4} nanoparticles of size ranging between 13 and 19 nm were synthesized by the hydrothermal method using polyethylene glycol (PEG) as surfactant. The role of annealing on phase, crystallite size, and morphology was determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Energy-dispersive X-ray spectroscopy (EDX) was used for qualitative analysis. X-ray diffraction confirmed the single phase of as-obtained particles. TEM revealed a spherical morphology having an average particle size of 13.73 nm at 523 K and rises to 14.89, 16.42, and 21.14 nm at 623, 723, and 823 K respectively, which is approximately the same as the crystallite size determined from XRD. EDX results confirmed that elemental ratios were in stoichiometry. Fourier transform infrared (FTIR) spectral analysis demonstrates the formation of M-O bond in NiFe{sub 2}O{sub 4} nanoparticles. The optical spectra obtained from UV-visible spectroscopy revealed that nanoparticles have direct allowed energy band gap of 2.34, 2.47, 2.70, and 2.20 eV at 523, 623, 723, and 823 K respectively. A vibrating sample magnetometer (VSM) was used at room temperature for magnetic measurements which further showed ferromagnetic behavior of as-synthesized material. In addition, it was found that saturation magnetization increases with an increase of annealingmore » temperature while coercivity decreases with temperature.« less

Authors:
; ; ;  [1]
  1. Deenbandhu Chottu Ram University of Science & Technology, Department of Physics (India)
Publication Date:
OSTI Identifier:
22773870
Resource Type:
Journal Article
Journal Name:
Journal of Superconductivity and Novel Magnetism
Additional Journal Information:
Journal Volume: 31; Journal Issue: 8; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1557-1939
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COERCIVE FORCE; CRYSTALS; FERRITES; FOURIER TRANSFORM SPECTROMETERS; HYDROTHERMAL SYNTHESIS; INFRARED SPECTRA; MAGNETIC PROPERTIES; MAGNETIZATION; MORPHOLOGY; NANOPARTICLES; NANOSTRUCTURES; NICKEL COMPOUNDS; PARTICLE SIZE; POLYETHYLENE GLYCOLS; STOICHIOMETRY; SURFACTANTS; TRANSMISSION ELECTRON MICROSCOPY; ULTRAVIOLET SPECTROMETERS; VIBRATING SAMPLE MAGNETOMETERS; VISIBLE SPECTRA; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY

Citation Formats

Sapna,, Budhiraja, Narender, Kumar, Vinod, and Singh, S. K., E-mail: sksingh2k6@gmail.com. Tailoring the Structural, Optical and Magnetic Properties of NiFe{sub 2}O{sub 4} by Varying Annealing Temperature. United States: N. p., 2018. Web. doi:10.1007/S10948-017-4529-Z.
Sapna,, Budhiraja, Narender, Kumar, Vinod, & Singh, S. K., E-mail: sksingh2k6@gmail.com. Tailoring the Structural, Optical and Magnetic Properties of NiFe{sub 2}O{sub 4} by Varying Annealing Temperature. United States. doi:10.1007/S10948-017-4529-Z.
Sapna,, Budhiraja, Narender, Kumar, Vinod, and Singh, S. K., E-mail: sksingh2k6@gmail.com. Wed . "Tailoring the Structural, Optical and Magnetic Properties of NiFe{sub 2}O{sub 4} by Varying Annealing Temperature". United States. doi:10.1007/S10948-017-4529-Z.
@article{osti_22773870,
title = {Tailoring the Structural, Optical and Magnetic Properties of NiFe{sub 2}O{sub 4} by Varying Annealing Temperature},
author = {Sapna, and Budhiraja, Narender and Kumar, Vinod and Singh, S. K., E-mail: sksingh2k6@gmail.com},
abstractNote = {Magnetic nanocrystalline NiFe{sub 2}O{sub 4} nanoparticles of size ranging between 13 and 19 nm were synthesized by the hydrothermal method using polyethylene glycol (PEG) as surfactant. The role of annealing on phase, crystallite size, and morphology was determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Energy-dispersive X-ray spectroscopy (EDX) was used for qualitative analysis. X-ray diffraction confirmed the single phase of as-obtained particles. TEM revealed a spherical morphology having an average particle size of 13.73 nm at 523 K and rises to 14.89, 16.42, and 21.14 nm at 623, 723, and 823 K respectively, which is approximately the same as the crystallite size determined from XRD. EDX results confirmed that elemental ratios were in stoichiometry. Fourier transform infrared (FTIR) spectral analysis demonstrates the formation of M-O bond in NiFe{sub 2}O{sub 4} nanoparticles. The optical spectra obtained from UV-visible spectroscopy revealed that nanoparticles have direct allowed energy band gap of 2.34, 2.47, 2.70, and 2.20 eV at 523, 623, 723, and 823 K respectively. A vibrating sample magnetometer (VSM) was used at room temperature for magnetic measurements which further showed ferromagnetic behavior of as-synthesized material. In addition, it was found that saturation magnetization increases with an increase of annealing temperature while coercivity decreases with temperature.},
doi = {10.1007/S10948-017-4529-Z},
journal = {Journal of Superconductivity and Novel Magnetism},
issn = {1557-1939},
number = 8,
volume = 31,
place = {United States},
year = {2018},
month = {8}
}