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Reflection Spectra of Some Garnet and Orthoferrite Single Crystals in Vacuum Ultraviolet
Author(s) -
Kučera M.,
Kolobanov V. N.,
Mikhailin V. V.,
Orekhanov P. A.,
Makhov V. N.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221570227
Subject(s) - orthoferrite , spectral line , synchrotron radiation , yttrium , materials science , reflection (computer programming) , single crystal , analytical chemistry (journal) , permittivity , crystal (programming language) , optics , chemistry , crystallography , physics , dielectric , optoelectronics , magnetic field , magnetization , chromatography , quantum mechanics , astronomy , computer science , metallurgy , programming language , oxide
The near normal reflectivity of single crystal garnets (Y 3 Fe 5 O 12 , Y 3 Fe 4 GaO 12 , Ca 3 Fe 2 Ge 3 O 12 , Y 3 Al 5 O 12 , Gd 3 Ga 5 O 12 ), and yttrium orthoferrite (YFeO 3 ) are studied over the energy range from 5 to 30 eV using synchrotron radiation. The spectra of complex permittivity ε 1 , ε 2 , the optical constants n , k , α, and the energy loss function Im(1/ε) are obtained by means of Kramers‐Kronig analysis. The optical spectra are very similar in this region and are only slightly affected by the different chemical composition of the samples. An interpretation of basic features of the spectra is proposed in terms of a simple energy band model.