Structural and optical properties of crystalline and nanocrystalline NaIn(WO₄)₂:Cr³⁺

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• 作者：H. Fuks ; T. Skibi艅ski ; S.M. Kaczmarek ; J. Hanuza ; G. Leniec ; K. Hermanowicz ; M. M膮czka ; M. Ptak
• 关键词：Double tungstate ; EPR spectra ; Optical properties ; Chromium(III)
• 刊名：Journal of Alloys and Compounds
• 出版年：5 February, 2014
• 年：2014
• 卷：585
• 期：Complete
• 页码：722-728
• 全文大小：1807 K

文摘

EPR and optical spectra of chromium doped NaIn(WO₄)₂ single crystals and nanopowders have been measured. The resonance EPR measurements have been performed for two crystal orientations in respect to the magnetic field and analyzed in terms of various Cr³⁺ ion site occupancies in the crystal lattice. They have been structurally and optically identified. The changes in the photoluminescence and electron spin resonance properties of the nanoparticles vs. their decreasing size have also been studied. Magnetic susceptibility and effective magnetic moment of the nanopowders were measured and discussed in terms of chromium substitution. Comparisons between chromium substitution in single crystals and nanopowders have been performed.