Time-resolved spectroscopy in LiCaAlF6 doped with Cr3+ as a function of pressure and temperature -: Excited-state crossover and phase-transition effects

被引：3
作者：
Sanz-Ortiz, M. N. [1 ]
Rodriguez, F. [1 ]
Hernandez, I. [1 ]
Valiente, R. [2 ]
Kueck, S. [3 ]
机构：
[1] Univ Cantabria, Fac Ciencias, DCITIMAC, E-39005 Santander, Spain
[2] Univ Cantabria, Fac Ciencias, Dpto Fis Aplicada, E-39005 Santander, Spain
[3] Phys Tech Bundesanstalt, Working Grp 4 13, D-38116 Braunschweig, Germany
来源：
JOURNAL OF LUMINESCENCE | 2008年 / 128卷 / 5-6期
关键词：
LiCaAlF6; Cr3+; high-pressure; time-resolved spectroscopy; excited state crossover;
D O I：
10.1016/j.jlumin.2007.10.027
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
This work investigates phase transition (PT) and excited-state-crossover (ESCO) effects on the photoluminescence (PL) properties of LiCaAlF6:Cr3+. The structural requirements for changing the Cr3+ PL behavior from a broad-band emission at 1.59eV (781 nm) at ambient conditions, to ruby-like narrow-line emission at 1.87eV (663 nm) are analyzed in the 0-35 GPa range. We report a PL study on LiCaAlF6:Cr3+ by means of time-resolved emission as a function of pressure and temperature. In particular we focus on the PL variations occurring around the pressure-induced trigonal-to-monoclinic first-order PT in LiCaAlF6 at 7 GPa. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：721 / 724
页数：4
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