Ferrimagnetic resonance linewidth in single-crystal Mn-doped Ba2Zn2Fe12O22

Abstract
The ferrimagnetic resonance linewidths in single crystals of Mn‐doped Ba2Zn2Fe12O22 were measured as a function of frequency (0.01–40 GHz) and temperature (4–300 K). In addition, the saturation magnetization, g factor, and planar anistropy fields were measured. The field linewidth ΔH appears to scale with frequency; however, the field linewidth as a function of temperature for the hexaferrite exhibits maxima. The temperature‐dependent resonant field values were used to calculate the anisotropy field as a function of temperature. These measurements were performed in a frequency‐swept slot‐coplanar device at a fixed value of applied magnetic field and in a traditional ferrimagnetic resonance system.

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