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- Title
YGdFeO: controlled synthesis, characterization and investigation of its magnetic properties.
- Authors
Ramesh, T.; Shinde, R.; Senthil Kumar, S.; Murthy, S.
- Abstract
Gadolinium substituted yttrium iron garnet (Gd: YIG: YGdFeO where x = 0, 0.25, 0.5, 0.75, 1, 1.25, 1.5) nanopowders were synthesized by microwave hydrothermal method. Phase structure of synthesized powders was examined using fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) which revealed a cubic garnet structure. Spherical-like morphology of synthesized powders was confirmed by field emission scanning electron microscopy (FESEM) studies. The synthesized powders were sintered at 1100 °C for 60 min using microwave furnace and characterized by using XRD and FESEM. Magnetic properties such as saturation magnetization and Curie temperature were measured using vibration sample magnetometer (VSM) and differential scanning calorimetry (DSC) studies respectively. Temperature stability of magnetization was measured using pulse magnetometer and complex permeability was measured over a frequency range of 100 kHz-1.8 GHz. The obtained results showed that the saturation magnetization as well as permeability decrease while curie temperature and temperature stability increase with Gd concentration. It is concluded that substitution of Gd makes the YIG better microwave magnetic material, which may be used in high power non-reciprocal microwave devices in the microwave region.
- Subjects
YTTRIUM iron garnet; GADOLINIUM compounds; MAGNETIC properties; FOURIER transform infrared spectroscopy; X-ray diffraction; MICROWAVE devices
- Publication
Journal of Materials Science: Materials in Electronics, 2017, Vol 28, Issue 19, p14138
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-017-7267-x