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Magnon density of states in yttrium iron garnet

Shamoto, Shinichi  ; Matsuura, Masato*; Akatsu, Mitsuhiro*; Ito, Takashi   ; Kajimoto, Ryoichi  ; Mori, Michiyasu  ; Onishi, Hiroaki  ; Nakamura, Mitsutaka   ; Kawamura, Seiko   ; Shibata, Kaoru  ; Nemoto, Yuichi*; Maekawa, Sadamichi

We have studied the magnon density of state in yttrium iron garnet ranging from 0.02 meV to 20 meV by using spectrometers, DNA, AMATERAS, and 4SEASONS, at J-PARC/MLF. The E-dependence is well reproduced by a simple square-root function in this energy range.



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