The 4f Intrashell Transitions of Ytterbium in Indium Phosphide

Abstract

Zeeman measurements in magnetic fields up to 16 T have been performed on the no-phonon lines labelled #3, #4, and #8 of the spectrum of ytterbium impurities in indium phosphide. A strong polarization effect and changes in intensities were observed. An energy level diagram is presented that satisfactorily explains the magnetic field effect and the relative intensities of the photoluminescence lines and is consistent with experiments described in the literature.

Magnetic Amplification at Yb3+“Designer Defects” in the van der Waals Ferromagnet CrI3

“…ρ increases rapidly at very low fields and saturates at only ∼0.2 T. Increasing the field from 0.2 to 6.0 T does not change ρ further, consistent with complete magnetization of Yb 3+ by 0.2 T. On an expanded scale, these data show a hysteresis with a coercivity of ∼55 mT, comparable to that found in magnetic measurements of bulk CrI 3 . 18,34 We note that these ρ values are generally small compared to those in cubic Yb 3+ :InP (∼70% at 10 T, 4.2 K), 33 possibly suggesting an in-plane or canted Yb 3+ anisotropy. Figure 3e summarizes the temperature dependence of ρ, measured at 0.5 T, and Figure 3f highlights the temperature dependence for Γ 8 → Γ 7 individually.…”