Magnetic and Microwave Properties of Polycrystalline Gadolinium Iron Garnet
The microwave loss in nanosized GdIG particles synthesized using mechanical alloying technique was investigated. There were very few of research on the microwave properties of nanosized particle GdIG and there is no attempt investigating on the material at C-band frequency range (4-8 GHz) and its...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Trans Tech Publications
2017
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/35454/1/100621%203.pdf http://ir.unimas.my/id/eprint/35454/ https://www.researchgate.net/profile/Rabaah-Azis/publication/320322733_Magnetic_and_Microwave_Properties_of_Polycrystalline_Gadolinium_Iron_Garnet/links/59ddb2e60f7e9b53c1a1bed1/Magnetic-and-Microwave-Properties-of-Polycrystalline-Gadolinium-Iron-Garnet.pdf |
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| Summary: | The microwave loss in nanosized GdIG particles synthesized using mechanical alloying
technique was investigated. There were very few of research on the microwave properties of
nanosized particle GdIG and there is no attempt investigating on the material at C-band frequency
range (4-8 GHz) and its correlation with the microstructure. Gadolinium (III) oxide and iron (III)
oxide, αFe2O3 were used as the starting materials. The mixed powder was then milled in a highenergy ball mixer/mill SPEX8000D for 3 hours. The samples were sintered at temperature 1200 oC
for 10 hours in an ambient air environment. The phase formation of the sintered samples was
analyzed using a Philips X’Pert Diffractometer with Cu-Kα radiation. Complex permeability
consisted of real permeability and magnetic loss factor were measured using an Agilent HP4291A
Impedance Material Analyzer in frequency range from 10 MHz to 1 GHz. A PNA-N5227 Vector
Network Analyzer (VNA) was used to obtain the information on ferromagnetic linewidth
broadening, ΔH that represents the microwave loss in the samples in frequency range of 4 to 8 GHz
(C-band). The ΔH value was calculated from the transmission (S21) data acquired from VNA. The
single phase GdIG showed low initial permeability of 1.48 and low magnetic loss of 0.13 when
applied with low frequency range energy (10MHz - 1GHz). From these data, it is validated that
GdIG is a suitable material for microwave devices for high frequency range |
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