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- W2511177012 abstract "Abstract M-type hexagonal ferrites with chemical composition Ba 0.5 Sr 0.5 Co x Al x Fe 12-2x O 19 (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) have been synthesized using a standard ceramic method. The electromagnetic or microwave parameters have been measured in the frequency range of 8.2 to 12.4 GHz using a vector network analyzer. The microwave absorption or reflection loss (RL) of different compositions has been evaluated comprehensively as a function of frequency, thickness and substitution Co 2 + and Al 3 + ions. The frequency dependence of microwave absorption, accompanied by the observed RL peaks in compositions, is governed by the quarter wavelength and/or impedance matching mechanisms. It was observed that composition x = 0.2 possesses highest RL peak of − 40.4 and − 39.7 dB at 11.72 and 10.63 GHz with thickness of 1.4 and 1.5 mm respectively. It also exhibits − 10 dB wideband absorption bandwidth of 3.27 GHz at 1.5 mm and − 20 dB absorption bandwidth of 1.09 GHz at 1.4 mm. Composition x = 1.0 owes − 20 dB narrowband absorption bandwidth of 170 MHz at 1.7 mm. The microwave absorption can be tuned by varying frequency, thickness and substitution of Co 2 + and Al 3 + ions. The large RL suggests that the compositions could be a potential candidate for microwave absorbing materials." @default.
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- W2511177012 date "2016-11-01" @default.
- W2511177012 modified "2023-10-03" @default.
- W2511177012 title "Tunable microwave absorption in Co Al substituted M-type Ba Sr hexagonal ferrite" @default.
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- W2511177012 doi "https://doi.org/10.1016/j.matdes.2016.08.049" @default.
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