The magnetic and optical properties of Ce3+ in LiCaAlF6

被引：34

作者：

Yamaga, M ^{[1
]}

Lee, D

Henderson, B

Han, TPJ

Gallagher, HG

Yosida, T

机构：

[1] Gifu Univ, Fac Engn, Dept Elect, Gifu 5011112, Japan

[2] Univ Strathclyde, Dept Phys & Appl Phys, Glasgow G1 1XN, Lanark, Scotland

[3] Nakanihon Automot Coll, Kamo 5050077, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1998年 / 10卷 / 14期

关键词：

D O I：

10.1088/0953-8984/10/14/011

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Electron spin-resonance (ESR) spectra of Ce3+-doped LiCaAlF6 (LiCAF) crystals measured at low temperature reveal three distinct Ce3+ centres in the crystal. The most intense spectrum is fitted to a spin Hamiltonian with trigonal symmetry and is associated with Ce3+ ions that substitute for Ca2+ ions in the LiCAF structure. Two other spectra have orthorhombic symmetry: they are assigned to Ce3+ ions with charge-compensating Li+-ion vacancies near to the Ce3+ impurity ions. The sigma(E\\a) and pi(E\\c) components of the polarized optical absorption and luminescence spectra of Ce3+ in LiCAF show there to be at least two Ce3+ centres. The intensities of optical transitions of Ce3+ are calculated using the eigenfunctions of the ground and excited states of Ce3+ in trigonal anl orthorhombic symmetry and are compared with the observed polarizations of the absorption and luminescence.

引用

页码：3223 / 3237

页数：15

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