Structural and Magnetic Behavior of BaAl{sub x}Cr{sub y}Fe{sub 11}O{sub 19} (x + y = 1) Hexagonal Ferrites

Journal Article · Thu Aug 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4980-5· OSTI ID:22922952

Alimoradi, M. ^[1]; Sadeghi, B. ^[2]; Amini, M. M. ^[3]; Abbasi, A. ^[4]

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1. Islamic Azad University, Department of Chemistry, Science and Research Branch (Iran, Islamic Republic of)
2. Islamic Azad University, Department of Chemistry, Tonekabon Branch (Iran, Islamic Republic of)
3. Shahid Beheshti University, Department of Chemistry (Iran, Islamic Republic of)
4. University College of Science, University of Tehran, School of Chemistry (Iran, Islamic Republic of)

The present study aims to analyze barium hexagonal ferrite and its derivation behavior using sol-gel auto-combustion co-doped with Al{sup 3+}/Cr{sup 3+}ions. Also, the effects of dopants on structural and magnetic properties of prepared samples were investigated. To this purpose, the finest powders were preheated at 500 °C for 1 h and calcinated at 900 °C about 2 h. Then, the magnetic powders were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and vibrating sample magnetometer (VSM). The XRD patterns show the magnetoplumbite phase. According to the Scherrer equation applied, inserting ions led to a decrease in lattice parameters (a and c) and crystallite size. The morphology of synthesized samples was observed by FESEM and proved the hexagonal shapes of the prepared samples. The nanoparticles sizes were recorded between 59 and 79 nm. Moreover, the magnetic properties of prepared samples were specified by VSM. The saturation magnetization (M{sub s}) and remnant magnetization (M{sub r}) of the synthesized magnetic powders were decreased by inserting Al{sup 3+}/Cr{sup 3+} ions, while coercivity (H{sub c}) increased from 5215 to 7178 Oe. .

• OSTI ID: 22922952
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 8 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ALUMINIUM ADDITIONS
BARIUM COMPOUNDS
CHROMIUM ADDITIONS
COERCIVE FORCE
DOPED MATERIALS
FERRITES
FIELD EMISSION
FOURIER TRANSFORM SPECTROMETERS
FOURIER TRANSFORMATION
INFRARED SPECTRA
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETIZATION
NANOCOMPOSITES
NANOPARTICLES
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION