Fascinating functional properties of Mn:Gd2 O3 nanocrystalline phosphor
Heiba, zein Elabidin; Imam, N. G.; Bakr Mohamed, Mohamed;
Abstract
In the present work we through the light on some of the fascinating structural, magnetic and optical properties of Mn:Gd2O3 nanophosphor. Manganese substituted nanocrystalline Mn:Gd2O3 was prepared via a sol gel procedure. The prepared samples were characterized applying X-ray diffraction (XRD), infrared spectroscopy (IR), squid magnometer and photoluminance (PL). XRD and IR analysis revealed a single phase solid solution up to x = 0.2. The cation distribution of Mn and Gd between the crystallographically non-equivalent sites 8b and 24d of the space group Ia3¯ is found to be preferentially for all samples. The lattice parameter decreases with composition x, accompanied with systematic variation in the r.m.s. microstrain (εL2)1/2. The magnetic measurement showed negative values for curie paramagnetic temperatures, θ, which indicates an antiferromagnetic interaction between the magnetic ions in Mn:Gd2O3. PL spectra showed a series of emission lines in the room temperature fluorescence measurements under UV excitation (220 nm). The observed emission lines are stokes-shifted and the non-linearity optical phenomenon is confirmed. Further, the emission lines are slightly shifted with Mn concentration (x). The blue emission around (390-402) nm was appeared due to Mn doping. Because of its fascinating properties, Mn:Gd2O3 is recommended for fuel cells, photocatalytic, and biomedical applications.
Other data
Title | Fascinating functional properties of Mn:Gd<inf>2</inf>O<inf>3</inf> nanocrystalline phosphor | Authors | Heiba, zein Elabidin ; Imam, N. G.; Bakr Mohamed, Mohamed | Keywords | Fluorescence;Magnetic;Rare earth oxide;Structure | Issue Date | 30-May-2015 | Journal | Journal of Molecular Structure | Volume | 1097 | Start page | 151 | End page | 156 | ISSN | 00222860 | DOI | 10.1016/j.molstruc.2015.05.013 | Scopus ID | 2-s2.0-84930655694 |
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