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Electron paramagnetic resonance of Gd3+ion in monocrystal YAl3(BO3)4

✍ Scribed by Prokhorov, A. D. ;Krygin, I. N. ;Prokhorov, A. A. ;Chernush, L. F. ;Aleshkevich, P. ;Dyakonov, V. ;Szymczak, H.

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
168 KB
Volume
206
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

The ground state of Gd^3+^ ions substituting for Y^3+^ in YAl~3~(BO~3~)~4~ single crystal has been studied by EPR method. Spin Hamiltonian parameters and their signs for Gd^3+^ ion in trigonal symmetry (g~z~ = 1.9893 ± 0.0002, g~x~ = g~y~ = 1.9860 ± 0.0002; $b_2^0 $ = 386.15 ± 0.11; $b_4^0 $ =β€‰βˆ’12.65 ± 0.07; $b_6^0 $ = 0.35 ± 0.10) were determined. Structural phase transition manifested as a discontinuous change of splitting of spectrum was observed near 157 K.

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## Abstract Luminescence properties of YAl~3~(BO~3~)~4~ (YAB) and Y~1–__x__~ Sc~__x__~ Al~3~(BO~3~)~4~ (YSAB) have been investigated under vacuum ultraviolet (VUV) light excitation. In YAB, two emission bands peaking at 3.2 and 3.9 eV are observed. On the other hand, there appear two emission bands