Optical and Magneto-Optical Properties of Gd22Fe78 Thin Films in the Photon Energy Range From 1.5 to 5.5 eV

Materials

Eva Jesenská¹  Takahiro Hashinaka¹  Takayuki Ishibashi¹  Lukáš Beran³  Ján Duᘞk³  Roman Antoš³  Kiyoshi Kuga²  Ken-ichi Aoshima²  Kenji Machida²  Hidekazu Kinjo²  Martin Veis³ 

[1] Department of Materials Science and Technology, Nagaoka University of Technology, Nagaoka, Niigata 1603-1, Japan;Science and Technology Research Laboratories, Japan Broadcasting Corporation (NHK), Tokyo 157-8510, Japan;Institute of Physics, Charles University, Prague 12116, Czech Republic;

关键词: GdFe;    magneto-optics;    spectroscopic ellipsometry;   

DOI  :  10.3390/ma9010023

来源: mdpi

【 摘 要 】

Optical and magneto-optical properties of amorphous Gd₂₂Fe₇₈ (GdFe) thin films prepared by direct current (DC) sputtering on thermally oxidized substrates were characterized by the combination of spectroscopic ellipsometry and magneto-optical spectroscopy in the photon energy range from 1.5 to 5.5 eV. Thin SiN_x and Ru coatings were used to prevent the GdFe surface oxidation and contamination. Using advanced theoretical models spectral dependence of the complete permittivity tensor and spectral dependence of the absorption coefficient were deduced from experimental data. No significant changes in the optical properties upon different coatings were observed, indicating reliability of used analysis.

【 授权许可】

CC BY   
© 2016 by the authors; licensee MDPI, Basel, Switzerland.