Magnetic and microwave absorption properties of W-type Ba(ZnxCo1-x)2Fe16O27 hexaferrite platelets.

Authors :: Zi, Z. F.
Dai, J. M.
Liu, Q. C.
Liu, H. Y.
Zhu, X. B.
Sun, Y. P.
Source :: Journal of Applied Physics; Apr2011, Vol. 109 Issue 7, p07E536-07E536-3, 1p, 1 Black and White Photograph, 1 Chart, 3 Graphs
Publication Year :: 2011
Abstract: W-type barium hexaferrite platelets Ba(ZnxCo1-x)2Fe16O27 (0.1 ≤ x ≤ 0.9) were prepared by a chemical coprecipitation route. The results of field-emission scanning electronic microscopy showed that the grains were regular hexagonal platelets with sizes from 0.5 to 1.5 μm. With increasing x, the coercivity decreased, whereas the saturation magnetization increased. Microwave absorption properties were investigated in the frequency range of 8-12 GHz. An optimal reflection loss (-24.8 dB) reached at 10 GHz for x = 0.5 with a thickness of 2 mm. These results indicated that our samples might be a potential candidate for permanent magnets and microwave absorption materials. [ABSTRACT FROM AUTHOR]

Subjects :: BARIUM halides
MAGNETICS
MICROWAVES
ABSORPTION
COERCIVE fields (Electronics)

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