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; et al.

no journal, , 

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.