Anisotropic Optical Spectra of YAlO3(YAP) Single Crystals in the Vacuum Ultraviolet Region. II. Spectra of Reflectivity

Autor:	Tomoyoshi Futemma, Masatada Yuri, Junkoh Tamashiro, Akira Yonesu, Tsuneaki Miyahara, Hirohito Fukutani, Yoshihiro Aiura, Tohru Shikenbaru, Yoshiiku Ganaha, Hiroo Kato, Tetsuhiko Tomiki
Rok vydání:	1994
Předmět:	Aluminium oxides Permittivity Materials science business.industry General Physics and Astronomy Dielectric Polarization (waves) Reflectivity Spectral line Optics Sum rule in quantum mechanics Atomic physics business Anisotropy
Zdroj:	Journal of the Physical Society of Japan. 63:1976-1985
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsj.63.1976
Popis:	Anisotropic reflectivity spectra of YAlO 3 single crystals at 297 K measured with the light polarized parallel to each of the a , b and c axes are presented in the range from ∼6.5 eV to ∼120 eV. A comparison of the reflectivity spectra of YAlO 3 with those of Y 2 O 3 , Y 3 Al 5 O 12 and α-Al 2 O 3 single crystals reaffirms that the peaks at ∼35 eV are mainly associated with the Y 3+ 4 p 6 and the features beyond ∼76 eV with the Al 3+ L 2,3 . Anisotropic reflectivity spectra at 10 K are shown in the region from ∼7 eV to 15 eV. Effective optical dielectric constants calculated by the sum rule including the imaginary part of the dielectric constant up to ∼120 eV are seen to saturate at the values corresponding to 98.0% ∼ 99.7% of the literature values of the optical dielectric constant.
Databáze:	OpenAIRE
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