Wydział Chemii

T. Aitasalo

Małgorzata Guzik

W. Szuszkiewicz

J. Hölsä

Barbara Keller

Janina Legendziewicz

2004

Journal of Alloys and Compounds

380

405-412

10.1016/j.jallcom.2004.03.066

Naukowa

Angielski

Artykuł

The spectroscopic behaviour of the Nd³⁺ and Yb³⁺ doped alkaline metal yttrium double phosphates, M₃Y_1−xLn_x(PO₄)₂ (M=Na, Rb; x=0.01–0.3) were studied for both powder and single crystal samples. The high resolution absorption and emission spectra were measured in the visible and IR regions. Spectral changes with the Nd³⁺ and Yb³⁺ concentration were interpreted. The absorption strengths of the 4f–4f transitions were analysed and used to assess the structural modifications of the two double phosphates. Based on the 4 K absorption spectra the number of metal sites occupied by the dopants was investigated. Strong emission from Na₃Y_1−xNd_x(PO₄)₂ involving the transitions were observed whereas the corresponding emission from the rubidium phosphate was presumably quenched by multiphonon processes due to the water molecules absorbed in the channel-like structure. The IR spectra were used to assign the vibronic components of the electronic transitions. The Yb³⁺ emission bands were broadened depending on the Yb³⁺ concentration (1–10 mol%). The tentative energy level scheme of the ground and excited 2FJ (J=7/2, 5/2) levels was described.

Neodymium, Ytterbium, Absorption, Emission, Yttrium double phosphates

https://doi.org/10.1016/j.jallcom.2004.03.066

http://www.elsevier.com