Abstract
In this paper, pure and indium-doped barium ferrite (BaInxFe12-xO19, x = 0, 1) thick films were fabricated by tape casting. X-ray diffraction and scanning electron microscopy results show that these BaM thick films have highly c-axis oriented crystallographic texture. Magnetic measurements indicated that pure samples exhibit excellent properties with a saturate magnetization (4) of 3806G, a high squareness ratio (Mr/Ms) of 0·85. Ferromagnetic resonance measurements showed that the smallest ferromagnetic resonance line width is 383 Oe at 45 GHz. When indium was introduced, the hexagonal grains disappear, and the 4 is decreased to 3201G. The anisotropy field decreased from 15·9 to 12·2 kOe, and the smallest ferromagnetic resonance line width became 387 Oe at 30 GHz. These data meant that these thick films have high self-biased property and low microwave loss, which makes sure that these samples can be applied in self-biased microwave/millimeter wave devices such as filters, circulators and isolators.
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