Aluminum and gallium substitution in yttrium and lutetium aluminum−gallium garnets: investigation by single-crystal NMR and TSL methods

0466124 - FZÚ 2017 RIV US eng J - Journal Article
Laguta, Valentyn - Zorenko, Y. - Gorbenko, V. - Iskalieva, A. - Zagorodniy, Y. - Sidletskiy, O. - Bilski, P. - Twardak, A. - Nikl, Martin
Aluminum and gallium substitution in yttrium and lutetium aluminum−gallium garnets: investigation by single-crystal NMR and TSL methods.
Journal of Physical Chemistry C. Roč. 120, č. 42 (2016), s. 24400-24408. ISSN 1932-7447. E-ISSN 1932-7455
R&D Projects: GA ČR GA16-15569S
Institutional support: RVO:68378271
Keywords : garnets * Ga and Al site occupation * nuclear magnetic resonance * thermoluminescence
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 4.536, year: 2016

The work reports the results on 71Ga and 27Al NMR investigation of the gallium and aluminum ions distribution over tetrahedral and octahedral positions in the Y3Al(5-x)GaxO12:Ce single crystals and Lu3Al(5-x)GaxO12:Ce single crystalline epitaxial films. The gallium content x varies between 0-5 in crystals and 0.3-2 in films. We find that in both the Y and Lu-based solid solutions the larger gallium ions are preferably located at the tetrahedral position while the smaller aluminum ions prefer the octahedral position of the garnet host. Our data confirm that the tetrahedral site preference (over the octahedral site) for the Ga occupation is an intrinsic property of the mixed Y(Lu3)Al5-x)GaxO12 garnets.
Permanent Link: http://hdl.handle.net/11104/0264526