Observation of Magnon Density of States in K<sub>2</sub>CuF<sub>4</sub> by Subthreshold Parallel Pumping
Hitoshi YamazakiDepartment of Physics, Faculty of Science, Okayama UniversityMotoyuki TanakaDepartment of Physics, Faculty of Science, Okayama University
1976en
ABI
Abstract
Subthreshold steady-state absorption under parallel pumping in a quasi-two-dimensional ferromagnet K 2 CuF 4 has been observed at a pumping frequency of 8.9 GHz in the temperature range from 1.4 to 4.2 K. The magnon density of states by which the magnitude of the absorption is mainly determined is experimentally revealed near the band edge including the singular point due to weak interlayer exchange interaction. A prospect for parallel pumping in a quasi-one-dimensional ferromagnet is given.
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