Crystal-field analysis of the spectroscopic characteristics and magnetic properties of Tm3+ in LiYF4 crystal
Identifieur interne : 001388 ( Pascal/Curation ); précédent : 001387; suivant : 001389Crystal-field analysis of the spectroscopic characteristics and magnetic properties of Tm3+ in LiYF4 crystal
Auteurs : C. Xueyuan [République populaire de Chine] ; L. Zundu [République populaire de Chine]Source :
- Journal of physics. Condensed matter [ 0953-8984 ] ; 1997.
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- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
On the basis of the analysis of a group-chain scheme and with the use of the constraint condition determined by the ratios of crystal-field parameters calculated using the point-charge model, a crystal-field-level fitting has been carried out for Tm3+:LiYF4, in which the Tm3+ ions are assumed to occupy positions with point symmetry D2d. The RMS value of the energy-level fitting is 11.4 cm-1. The wavefunctions obtained were used in the study of the magnetic, thermal, and spectroscopic properties of the crystal. The calculated g-factors obey Karayianis's partial g-sum rule. The temperature dependences of the Schottky specific heat and magnetic susceptibility agree well with data published by others. The line shown by calculation to be the strongest is σ-polarized at 450.4 nm, which corresponds to blue upconversion lasing in the experiment. The method proposed turns out to be effective in the study of the spectroscopic and magnetic properties of localized centres in crystals.
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in LiYF<sub>4</sub>
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<s2>Fuzhou, Fujian, 350002</s2>
<s3>CHN</s3>
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<sZ>2 aut.</sZ>
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<author><name sortKey="Zundu, L" sort="Zundu, L" uniqKey="Zundu L" first="L." last="Zundu">L. Zundu</name>
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<term>Magnetic susceptibility</term>
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<term>Ternary compounds</term>
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<term>Chaleur massique</term>
<term>Susceptibilité magnétique</term>
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<term>Facteur Landé</term>
<term>Lithium fluorure</term>
<term>Yttrium fluorure</term>
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<front><div type="abstract" xml:lang="en">On the basis of the analysis of a group-chain scheme and with the use of the constraint condition determined by the ratios of crystal-field parameters calculated using the point-charge model, a crystal-field-level fitting has been carried out for Tm<sup>3+</sup>
:LiYF<sub>4</sub>
, in which the Tm<sup>3+</sup>
ions are assumed to occupy positions with point symmetry D<sub>2d</sub>
. The RMS value of the energy-level fitting is 11.4 cm<sup>-1</sup>
. The wavefunctions obtained were used in the study of the magnetic, thermal, and spectroscopic properties of the crystal. The calculated g-factors obey Karayianis's partial g-sum rule. The temperature dependences of the Schottky specific heat and magnetic susceptibility agree well with data published by others. The line shown by calculation to be the strongest is σ-polarized at 450.4 nm, which corresponds to blue upconversion lasing in the experiment. The method proposed turns out to be effective in the study of the spectroscopic and magnetic properties of localized centres in crystals.</div>
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<fC01 i1="01" l="ENG"><s0>On the basis of the analysis of a group-chain scheme and with the use of the constraint condition determined by the ratios of crystal-field parameters calculated using the point-charge model, a crystal-field-level fitting has been carried out for Tm<sup>3+</sup>
:LiYF<sub>4</sub>
, in which the Tm<sup>3+</sup>
ions are assumed to occupy positions with point symmetry D<sub>2d</sub>
. The RMS value of the energy-level fitting is 11.4 cm<sup>-1</sup>
. The wavefunctions obtained were used in the study of the magnetic, thermal, and spectroscopic properties of the crystal. The calculated g-factors obey Karayianis's partial g-sum rule. The temperature dependences of the Schottky specific heat and magnetic susceptibility agree well with data published by others. The line shown by calculation to be the strongest is σ-polarized at 450.4 nm, which corresponds to blue upconversion lasing in the experiment. The method proposed turns out to be effective in the study of the spectroscopic and magnetic properties of localized centres in crystals.</s0>
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