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Issue 39, 2013
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Influence of neodymium-doping on structure and properties of yttrium aluminium garnet

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Abstract

We study the impact of the Nd-doping on the grain formation, the crystal structure, and the fluorescence of the Yttrium Aluminum Garnet (YAG). The results show that Nd-doping leads to the YAG lattice expansion and distortion, and hence to an increase in defect concentration. This is attributed to substitution of larger Nd3+ ions for smaller Y3+ ions. As a result, the fluorescence intensity of Nd:YAG increases and reaches a maximum at 3 at% Nd. Above 3 at% Nd, the lattice distortion becomes more evident, and the Nd3+ ions segregate on the surface of grains and thus the fluorescence intensity decreases. Above 8 at% Nd, a large fraction of Nd3+ ions cannot enter the YAG lattice, but reside on the surface of grains instead, leading to formation of disordered clad layers. Above 10 at% Nd, a high degree of disorder in the structure is induced by the Nd3+ segregation both in the interior and boundary of grains. Above 15 at% Nd, Schottky and Frenkel defects appear due to the lattice distortion. In general, at Nd > 3 at% the Nd3+ segregation and concentration quenching cause the attenuation of the fluorescence of Nd:YAG.

Graphical abstract: Influence of neodymium-doping on structure and properties of yttrium aluminium garnet

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Publication details

The article was received on 04 Jun 2013, accepted on 07 Aug 2013 and first published on 08 Aug 2013


Article type: Paper
DOI: 10.1039/C3CE41006D
CrystEngComm, 2013,15, 8029-8035

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    Influence of neodymium-doping on structure and properties of yttrium aluminium garnet

    X. Zhang, W. He, Y. Yue and Y. Zhang, CrystEngComm, 2013, 15, 8029
    DOI: 10.1039/C3CE41006D

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