| First name | Takao |
|---|---|
| Family name | Otsuka |
Hiroaki Nakamura, Hisanori Miyanishi, Takuo Yasunaga, Susumu Fujiwara, Tomoko Mizuguchi, Ayako Nakata, Tsuyoshi Miyazaki, Takao Otsuka, Takahiro Kenmotsu, Yuji Hatano and Shinji Saito, Japanese Journal of Applied Physics, 59, 1-6 (2020)