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

JOURNAL OF ALLOYS AND COMPOUNDS

卷:672

Article

Kumar, G. A.¹  Balli, Nicolas R.¹  Kailasnath, M.²  Mimun, L. Christopher¹  Dannangoda, Chamath³  Martirosyan, Karen S.³  Santhosh, C.⁴  Sardar, Dhiraj K.¹ 

[1] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78249 USA

[2] Cochin Univ Sci & Technol, Int Sch Photon, Kochi 682022, Kerala, India

[3] Univ Texas Rio Grande Valley, Brownsville, TX 78520 USA

[4] Manipal Univ, Dept Atom & Mol Spect, Manipal 576104, Karnataka, India

关键词: Multifunctional materials;    Optical properties;    Magnetic properties;    Sub-micron-stars;    Rare earths;   

DOI  :  10.1016/j.jallcom.2016.02.165

来源: Elsevier

【 摘 要 】

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 degrees 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 mu s at 1064 nm with 0.5 mol% Nd3+. Under 808 nm excitation with 12 W/cm(2) 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. (C) 2016 Elsevier B.V. All rights reserved.

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