Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7997882 | Journal of Alloys and Compounds | 2016 | 25 Pages |
Abstract
Neodymium-doped gadolinium orthophosphate (GdPO4:Nd3+) luminomagnetic sub-micron-stars were prepared by solvothermal method using metal nitrates and phosphoric acid. Monoclinic star shaped in six lobed sub-micron-stars with 600 nm length is obtained with uniform particle size distribution. After heat-treatment at 800 °C for 1 h in air, the stars separate into isolated petal shaped particles and show characteristic emission bands of Nd3+ with the strongest emission at 1064 nm. The emission intensities and fluorescence decay times are dependent on the Nd3+ concentration with the highest emission intensity and longest fluorescence decay time of 311 μs at 1064 nm with 0.5 mol% Nd3+. Under 808 nm excitation with 12 W/cm2 power density a quantum yield of 9% was obtained for the 1.0 mol% Nd3+. The presence of paramagnetic Gd3+ gives magnetic properties to the phosphor with a calculated magnetic moment of 1510 and 107,965 Bohr magneton at 300 and 5 K, respectively.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
G.A. Kumar, Nicolas R. Balli, M. Kailasnath, L. Christopher Mimun, Chamath Dannangoda, Karen S. Martirosyan, C. Santhosh, Dhiraj K. Sardar,