The strontium lanthanum aluminate SrLaAlO₄ (SLA) crystallizes in the perovskite-like K₂NiF₄ structure (a = b = 3.756 Å, c = 12.64 Å) with space group I4/mmm[1] and belongs to the group of materials with the general chemical formula ABCO₄, where A = Ca, Sr or Ba, B = Y or some other rare earth metal, and C = Al, Ga or some transition metal[2] (and references therein).

Doping of manganese ions could give a number of interesting properties of the materials as for holographic recording and optical data storage, laser light optical limiters, thermoluminescent dosimetry, fluorescent thermometry or thermoluminescent screens for visualization of local heating of various origin, including heating by IR laser light.

The nanosized powder of SrLaAlO₄ doped with 0.02 at% Mn ions was obtained by modified sol-gel method (Pechini). The solution with acetic acid as complexing agent and ethylene glycol as polymerizing agent was used. The xerogel was dried at 150°C for 12 h and then grinded in an agate mortar to obtain fine powder. The powders were annealed at different temperatures in the air atmosphere. The single phase compound of SLA structure was obtained.

The size and morphology of nanocrystals were analyzed by high resolution scanning electron microscopy (HRSEM) with LEO GEMINI 1530 apparatus. Identification of crystalline phases in samples was made by X-ray diffraction (XRD) using a Siemens D-500 powder diffractometer with CuK_α radiation at the wave length λ= 1.5418 Ǻ.

Acknowledgements

This work was supported by the Polish National Research Center, project nr NN 515 500 440.

[1] R.D. Shannon, R.A. Oswald, J.B. Parise, B.H.T. Chai, P. Byszewski, A. Pajaczkowska, R. Sobolewski, J. Solid State Chem. 98 (1992) 90–98.

[2] A. Pajaczkowska, A. Gloubokov, Prog. Crystal Growth and Charact. 36 (1998) 123-162.

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