Spectroscopic and magnetic properties of neodymium doped in GdPO4 sub-micron-stars prepared by solvothermal method

G. A. Kumar, Nicolas R. Balli, M. Kailasnath, L. Christopher Mimun, Chamath Dannangoda, Karen S. Martirosyan, C. Santhosh, Dhiraj K. Sardar

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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.

Original languageEnglish
Pages (from-to)668-673
Number of pages6
JournalJournal of Alloys and Compounds
Volume672
DOIs
Publication statusPublished - 05-07-2016

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All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Kumar, G. A., Balli, N. R., Kailasnath, M., Mimun, L. C., Dannangoda, C., Martirosyan, K. S., ... Sardar, D. K. (2016). Spectroscopic and magnetic properties of neodymium doped in GdPO4 sub-micron-stars prepared by solvothermal method. Journal of Alloys and Compounds, 672, 668-673. https://doi.org/10.1016/j.jallcom.2016.02.165