Microwave-Hydrothermal Synthesis of Y{sub 3}Fe{sub 5}O{sub 12} Nanoparticles: Sintering Temperature Effect on Structural, Magnetic and Dielectric Properties

Journal Article · Fri Jun 15 00:00:00 EDT 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4425-6· OSTI ID:22771158

Rao, G. Narayana ^[1]; Suneetha, T. ^[2]; Shinde, R. S. ^[3]; Murthy, S. R. ^[4]

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1. Indian Institute of Technology Bombay, Department of Electrical Engineering (India)
2. Indian Institute of Technology Delhi, Department of Physics (India)
3. RRCAT, Accelerator Magnet Technology Division (India)
4. Osmania University, Department of Physics (India)

Herein, we report a facile microwave-assisted hydrothermal method for the preparation of yttrium iron garnet (YIG, Y{sub 3}Fe{sub 5}O{sub 12})nanocrystals and realized the synergy between its structural and magnetic properties. The as-prepared powder thermal stability was characterized in detail by using thermogravimetric-differential thermal analysis (TG-DTA). The synthesized powder was microwave sintered at six different temperatures ranging from 973 to 1373 K for 60 min and characterized using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). Magnetic properties were investigated by vibrating-sample magnetometer (VSM) and ferromagnetic resonance (FMR) studies. The frequency variation of dielectric and magnetic properties was measured in the frequency range of 100 kHz–1.8 GHz. The observed magnetic and dielectric parameters such as saturation magnetization, coercivity, permeability, linewidth, dielectric constant and magnetodielectric losses are strongly affected by sintering temperature. The saturation magnetization and coercivity of YIG were found in the range 14.4–28.0 emu/g and 35–87 Oe, respectively. Furthermore, the FMR linewidth decreases from 844 to 204 Oe. This analysis undoubtedly demonstrates that the synthesis method and sintering temperature have the prominent effect on the electrical and magnetic properties of YIG and would be very useful for the garnet-based microwave device applications.

• OSTI ID: 22771158
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 6; 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); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COERCIVE FORCE
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
DIFFERENTIAL THERMAL ANALYSIS
FERRITE GARNETS
FERROMAGNETIC RESONANCE
HYDROTHERMAL SYNTHESIS
IRON OXIDES
LINE WIDTHS
MAGNETIC PROPERTIES
MAGNETIZATION
MICROWAVE RADIATION
NANOPARTICLES
NANOSTRUCTURES
PERMEABILITY
SCANNING ELECTRON MICROSCOPY
SINTERING
TEMPERATURE DEPENDENCE
THERMAL GRAVIMETRIC ANALYSIS
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS