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http://dx.doi.org/10.4283/JKMS.2009.19.6.203

Microwave Absorbing Properties of M-type Barium Ferrites with BaTi0.5Co0.5Fe11O19 Composition in Ka-band Frequencies  

Kim, Yong-Jin (Department of Advanced Materials Engineering, Chungbuk National University)
Kim, Sung-Soo (Department of Advanced Materials Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Magnetics Society / v.19, no.6, 2009 , pp. 203-208 More about this Journal
Abstract
Magnetic and Ka-band absorbing properties have been investigated in Ti-Co substituted M-type barium hexaferrites with $BaTi_{0.5}Co_{0.5}Fe_{11}O_{19}$ composition. The ferrite powders were prepared by conventional ceramic processing technique and used as absorbent fillers in ferrite-rubber composites. The magnetic properties were measured by vibrating sample magnetometer. The complex permeability and dielectric constant were measured by using the WR-28 rectangular waveguide and network analyzer in the frequency range 26.5~40 GHz. For the Ti-Co substituted M-hexaferrites, the ferromagnetic resonance is observed at Ka-band (29.4 GHz). The matching frequency and matching thickness are determined by using the solution map of impedance matching. A wide band microwave absorbance is predicted with controlled ferrite volume fraction and absorber thickness.
Keywords
M-type barium ferrite; Ka-band; microwave absorbers; ferromagnetic resonance;
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Times Cited By KSCI : 3  (Citation Analysis)
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