Optical Spectra of Y_3Fe_5O_<12>(YIG) in the Y^<3+> 4p Core Excitation Region

概要

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Reflectivity spectrum of YIG was measured at room temperature in the Y^<3+> 4p core excitation region. The optical constants are obtained by a multi-angle method. Two broad spectral bands at 29.3 and 33.3 eV and five small structures at 20.2, 22.5, 27.3, 36.5 and 40 eV were newly found in ε_2 spectrum. The spectral structures are assigned ; the large spectral band at 33.3 eV is made up of two transitions from Y 4p^6 ^1S_o to Y 4p^5 5s^1 (3/2, 1/2), (1/2, 1/2), where the first member in the parenthesis indicates the total angular momentum j of hole and second specifies j of electron, the structure 29.3 eV is made of a transition to Y 4p^5 4d^1 ^1P_1. In YIG the energy positions of Y 4p^5 5s^1 (3/2, 1/2), (1/2, 1/2) are about same in Y^<3+> free ion, but Y 4p^54d^1 ^1P_1 is shifted by 5.7 eV.
社団法人日本物理学会の論文
1994-12-15