Defect Luminescence of Yag Nanopowders and Crystals
نویسندگان
چکیده
منابع مشابه
COMPUTATIONAL ENUMERATION OF POINT DEFECT CLUSTERS IN DOUBLE- LATTICE CRYSTALS
The cluster representation matrices have already been successfully used to enumerate close-packed vacancy clusters in all single-lattice crystals [I, 2]. Point defect clusters in double-lattice crystals may have identical geometry but are distinct due to unique atomic postions enclosing them. The method of representation matrices is extended to make it applicable to represent and enumerate ...
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the cluster representation matrices have already been successfully used to enumerate close-packed vacancy clusters in all single-lattice crystals [i, 2]. point defect clusters in double-lattice crystals may have identical geometry but are distinct due to unique atomic postions enclosing them. the method of representation matrices is extended to make it applicable to represent and enumerate the ...
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We investigate the effects of interactions between substitutional defects on the properties of defect crystals at low temperatures, where defect motion is governed by quantum effects. Both thermal and dynamical properties are considered. The influence of interactions on defect motion is described via a collective effect. Our treatment is semiclassical in the sense that we analyze collective eff...
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Luminescence emission of Tm~ + in YAG codoped with Cr~ + under selective (into ~E Cr~ + levels or ~F~ Tm~ + levels) and nonselective (into ~Y~ Cr~ + level) excitation is dominated by three new centers. Based on structural and spectral characteristics, these centers are associated with the three possible perturbations produced by C~+ ions at the nearest neighbour Tm~ + ions. A selective energy t...
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ژورنال
عنوان ژورنال: Latvian Journal of Physics and Technical Sciences
سال: 2012
ISSN: 0868-8257
DOI: 10.2478/v10047-012-0022-4