Enhanced Dispersion Frequency of Hot-Pressed Z-Type Magnetoplumbite Ferrite with the Composition 2CoO·3Ba0.5Sr0.5O·10.8Fe2O3 |
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| Authors: | Osamu Kimura Masafumi Matsumoto Mitsuo Sakakura |
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| Affiliation: | Department of Materials Science and Ceramic Technology, Shonan Institute of Technology, Nishikaigan, 1–1–25, Tsujido, Fujisawa, Kanagawa, 251, Japan;Development Department, Toko Co. Ltd., Tamagawa, 828, Tamagawa, Hiki-gun, Saitama, 355–04, Japan |
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| Abstract: | The high-frequency magnetic properties of strontium-partially-substituted Z-type magnetoplumbite with the composition 2CoO·3Ba1-x.SrxO.yFe2O3 were studied using a hot-pressing technique. The best properties were obtained for a sample hot-pressed in oxygen, having x and y values of 0.5 and 10.8, respectively. The resonant frequency of that sample, corresponding to a μ" maximum reaching 2.5 GHz, was significantly larger than the value of 1.4 GHz previously reported for unsubstituted Z with the composition 2CoO·3BaO·12Fe2O3. This result implies that a new ferrite material, applicable in the gigahertz region, has been obtained. |
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