Yokosuka Masaru | Faculty of Science and Engineering, Iwaki-Meisei University, Chuodai, Iwaki, Fukushima 970, Japan

Kobayashi Institute of Physical Research

Department of Applied Physics and Chemistry, University of Electro-Communications

Faculty Of Science And Engineering Iwaki-meisei University

Department Of Applied Physics And Chemistry The University Of Electro-communications

Department Of Applied Physics And Chemistry University Of Electro-communications

Faculty of Science and Engineering, Iwaki-Meisei University, Chuodai, Iwaki, Fukushima 970, Japan

Kobayasi Institute of Physical Research, Higashi-Motomachi, Kokubunji, Tokyo 185, Japan

Department of Applied Physics and Chemistry, University of Electro-Communications, Chofugaoka, Chofu, Tokyo 182, Japan