Electron Paramagnetic Resonance and Photoluminescence Studies of LaMgAl11O19:Mn2+ Green Phosphors

Effects of Impurity Doping on the Luminescence Performance of Mn4+-Doped Aluminates with the Magnetoplumbite-Type Structure for Plant Cultivation

“…Besides, LaMgAl 11 O 19 (LMA) with a magnetoplumbite structure exhibits excellent physical and chemical stability and contains an amount of [AlO 6 ] octahedral sites to accept doped Mn 4+ ions into the LMA lattice [19]. The LaMgAl 11 O 19 host doped with Mn 2+ ions has been reported in a great deal of research [20,21,22,23]. However, the related luminescence property of LaMgAl 11 O 19 /Mn 4+ (LMA/Mn 4+ ) phosphor is rarely reported.…”

A highly Mn2+-doped narrowband green phosphor toward wide color-gamut display applications

“…2c), which are a result of a hyperfine coupling between the nuclear spin of Mn ( I = +5/2) and the electrons in the 3d orbital of the Mn 2+ . 40 SEM images of the LAO:0.30Mn 2+ sample show an irregular particle morphology stacked with dozens of minor sheets and the particle size distribution is in the range of several dozen micrometers (Fig. 2d and e).…”

Stability and Transformation of Ferrihydrite Coprecipitated with Metals: Dependence of Choice of Iron Salt Precursor

“…The ESR spectrum of all unheated HM-SFh and HM-NFh exhibited a ferrihydrite signal close to g = 2.0; however, the signal gets broadened with the increase of heavy-metal concentration (Figures b 1 ,b 2 ,c 1 ,c 2 and S2a 1 ,a 2 ,b 1 ,b 2 ). A higher concentration of iron oxides broadens the resonance spectrum in the synthetic sample, resulting in the superposition of the ESR spectrum and hindering the identification of paramagnetic substances . The ESR spectrum of the heated pure-NFh sample shows resonance signals near g ≈ 2.28 and g ≈ 2.85 corresponding to hematite and Fe­(III) coupling through exchange interaction (Figure a 2 ).…”

“…A higher concentration of iron oxides broadens the resonance spectrum in the synthetic sample, resulting in the superposition of the ESR spectrum and hindering the identification of paramagnetic substances. 48 The ESR spectrum of the heated pure-NFh sample shows resonance signals near g ≈ 2. 28 corresponding to hematite and Fe(III) coupling through exchange interaction 48 (Figure 3a 2 ).…”

“…48 The ESR spectrum of the heated pure-NFh sample shows resonance signals near g ≈ 2. 28 corresponding to hematite and Fe(III) coupling through exchange interaction 48 (Figure 3a 2 ).…”