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Screen Printed Thick Self-Biased, Low-Loss, Barium Hexaferrite Films By Hot-Press Sintering, Yajie Chen, Tomokazu Sakai, Taiyang Chen, Soack Yoon, Carmine Vittoria, Vincent Harris
Screen Printed Thick Self-Biased, Low-Loss, Barium Hexaferrite Films By Hot-Press Sintering, Yajie Chen, Tomokazu Sakai, Taiyang Chen, Soack Yoon, Carmine Vittoria, Vincent Harris
Vincent G. Harris
BaFe₁₂O₁₉ hexaferrite thick films having high hysteresis loop squareness (Mr/Ms) and low ferromagnetic resonance (FMR) linewidths were processed through the use of a screen printing technique coupled with hot-press sintering. Scanning electron microscopy and x-ray diffraction measurements exhibit strong crystallographic c-axis alignment of crystals perpendicular to the film plane. Static magnetic resonance and FMR measurements were performed to determine the effect of the preparation technique on magnetic hysteresis and microwave properties. Hot pressing during sintering produced dense thick films having high squareness (> 0.95) and reduced coercivity (∽1900 Oe). Of greater importance was the measurement of a minimum peak-to-peak FMR …