F. Kadlec, C. Kadlec, J. Buršík, J. Vít, V. Goian, J. Prokleška, M. Kempa, F. Borodavka, S. Rols, S. Kamba
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Abstract
THz, infrared and inelastic neutron scattering spectra of Z-hexaferrite ceramics were measured in a broad range of temperatures. A sharp electromagnon is observed near 1THz, vanishing with increasing magnetic field until a phase transition occurs at H ≈ 2T. Then, another strong peak whose resonance frequency is linearly proportional to the magnetic field turns up from the sub-THz range. We assign this peak to a ferrimagnetic resonance.
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