Enhancement of Curie temperature and photoluminescent properties of Nd2Mo2O7, Ho2Mo2O7, and Gd2Mo2O7

Abstract

For Nd1.90Er0.10Mo2O7, Ho1.90Er0.10Mo2O7, and Gd1.98Eu0.02Mo2O7 nominal compositions, oxide compounds were prepared by solid-state reaction method. X-ray diffraction measurements show that molybdenum oxides formed cubic phase except for Nd1.90Er0.10Mo2O7. Scanning electron microscopy was used to observe their microstructure and elemental analysis. The photoluminescence properties of the materials, the excitation and emission spectra and the decay curve, were investigated using photoluminescence spectrophotometer. Dielectric and piezoelectric properties of the ptoluminescent materials, the dielectric constant, dielectric loss, piezoelectric constant, and Curie temperature, were measured for electrical characterization. Nd1.90Er0.10Mo2O7, Ho1.90Er0.10Mo2O7, and Gd1.98Eu0.02Mo2O7 materials show both photoluminescence and piezoelectric properties.