Shin-ichi Ohkoshi, Shiro Kuroki, Shunsuke Sakurai, Kazuyuki Matsumoto, Kimitaka Sato and Shinya Sasaki
Millimeter waves , with a range of 30–300 GHz, are beginning to be used in electronic devices for high-speed wireless communications. In their Communication on page 8392 ff., S. Ohkoshi et al. report a new millimeter-wave absorber composed of ε-GaxFe2−xO3 (0.10≤x≤0.67) nanomagnets, which shows a ferromagnetic resonance in the 35–190-GHz region. The picture shows a Japanese landscape garden, Zuiho-in in Kyoto, in which the center rock, the ripples of sand, and the near rock evoke a millimeter-wave generator, millimeter waves, and the millimeter-wave absorber, respectively.