| Summary: | The properties of thick BaSc<sub>x</sub>Fe<sub>1</sub><sub>2</sub><sub>-</sub><sub>x</sub>O<sub>1</sub><sub>9</sub> (0.3 < x < 0.6) scandium hexaferrite films were measured by static and microwave field techniques. Films were deposited by pulsed laser ablation onto c-plane sapphire at oxygen pressures of 20 and 50 mTorr. Vibrating sample magnetometer measurements as corroborated by x-ray data showed that the films below 3 μm had easy axis of magnetization (c-axis) normal to the film plane with saturation magnetization values of 3.0-3.8 kG. From the ferrimagnetic resonance frequency versus external magnetic field, we deduced a g value of 1.96 ± 0.03 and uniaxial anisotropy field of similar to 10 kOe. The ferrimagnetic resonance linewidth for the film thicker than 5μm was maximum at 32 GHz and decreased with increasing frequency, indicating evidence for nonuniform magnetic field scattering internally. However, the linewidths were lower for films having thickness below 3 μm.
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