Magnetic and Structural Properties of SrFe{sub 12−x}Cr{sub x}O{sub 19} (x = 0, 0.25, 0.5, 0.75, 1) Hexaferrite Powders Obtained by Sol–Gel Auto-Combustion Method
- University of Birjand, Magnetism and Superconducting Research Laboratory, Department of Physics (Iran, Islamic Republic of)
- Ferdowsi University of Mashhad, Department of Physics, Faculty of Science (Iran, Islamic Republic of)
The crystalline structure and magnetic properties of chromium substituted hexagonal strontium ferrite, SrFe{sub 12−x}Cr{sub x}O{sub 19} (x = 0, 0.25, 0.5, 0.75, 1), nanoparticles have been investigated by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), and vibrating sample magnetometer (VSM). These materials were prepared by the chemical sol–gel auto-combustion method. From the structural analysis, it was observed that the non-magnetic phase α-Fe{sub 2}O{sub 3} appears after x ≥ 0.5 and remains to be a hexagonal magnetoplumbite phase for x < 0.5. Various parameters such as lattice constants (a and c) were calculated from the XRD data. The coercively H{sub c} initially decreases and then increases with increasing chromium concentration. The saturation magnetization exhibits an increase as the chromium content increases up to (x = 0.25) and then decreases with increase in the Cr content ion from 75.19 to 61.66 emu/g due to the substitution of Fe{sup 3+} ions by less magnetic Cr{sup 3+} ions. Furthermore, M{sub r} continually decreases with increase in the Cr content.
- OSTI ID:
- 22771313
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 5; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media, LLC; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHROMIUM
CHROMIUM IONS
CONCENTRATION RATIO
FERRITES
FOURIER TRANSFORM SPECTROMETERS
IRON IONS
IRON OXIDES
MAGNETIC PROPERTIES
NANOPARTICLES
SOL-GEL PROCESS
STRONTIUM COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION