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Ytterbium-doped InP emits a characteristic luminescence band near 1.0 {μ}m, arising from intra-4f-shell transitions of Yb³⁺(4f¹³). A Zeeman analysis of the complex set of emission lines, in magnetic fields up to 22 T, reveals that the spectrum arises almost entirely from only one type of cubic Yb center, presumably on a substitutional cation site.
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Aszódi et al. (1985) studied this question.
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