Journal of Materials Research


The Faraday effect in diamagnetic glasses

Jianrong Qiua1 and Kazuyuki Hiraoa2

a1 Hirao Active Glass Project, ERATO, JST-C, Keihanna Plaza, Seika-cho, Kyoto 61902, Japan

a2 Hirao Active Glass Project, ERATO, JST-C, 15 Morimoto-cho, Shimogamo, Sakyo-ku Kyoto 606, Japan, and Division of Material Chemistry, Faculty of Engineering, Kyoto University, Sakyo-ku, Kyoto 606–01, Japan


The wavelength dispersions of the Faraday effect in typical diamagnetic glasses, i.e., silica, borate, silicate, tellurite, lead-bismuth-gallate, and As2S3, have been examined. The Verdet constant of the glasses decreases with increasing wavelength in the longer wavelength region of the absorption edge of the glasses, while it increases with increasing optical bandgap of the glasses. These phenomena have been successfully explained based on the Becquerel theory. A guiding principle in designing a diamagnetic glass with a high Verdet constant is proposed.

(Received March 30 1997)

(Accepted July 14 1997)