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A Simple Theory of the Mn 4+ R‐Line Shape in Gadolinium Gallium Garnet
Author(s) -
Bulyarskii S.V.,
Prikhodko V.V.
Publication year - 2000
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 - 10.1002/1521-3951(200011)222:2<563::aid-pssb563>3.0.co;2-l
Subject(s) - line (geometry) , excitation , gadolinium gallium garnet , spectral line , simple (philosophy) , gadolinium , ion , atomic physics , paramagnetism , spin (aerodynamics) , gallium , emission spectrum , physics , materials science , condensed matter physics , mathematics , quantum mechanics , geometry , nanotechnology , philosophy , epitaxy , epistemology , layer (electronics) , metallurgy , thermodynamics
A simple model is proposed which allows the calculation of splittings of the 4 T 2 and 2 E states due to spin–spin interaction in Gd 3 Ga 5 O 12 :Mn 4+ . The model assumes paramagnetic behaviour of both Mn 4+ and Gd 3+ ions, which is valid above T ≈ 3 K. R‐line shapes in both emission and excitation spectra have been calculated that agree well with experimental data. The model proposed gives a satisfactory explanation for the anomalous R‐line broadening and the large spectral shift between the emission and excitation spectra.