Detection of phase transitions in RbTiOPO4 and KTiOPO4 by luminescence

被引：6

作者：

Kannan, CV ^{[1
]}

Kurt, K

Vaitianathan, V

Ganasamoorthy, S

Ramasamy, P

Townsend, PD

机构：

[1] Anna Univ, Ctr Crystal Growth, Madras 600025, Tamil Nadu, India

[2] Cukurova Univ, Phys Sci & Art Fac, TR-01330 Balcali, Turkey

[3] Univ Sussex, Dept Sci & Technol, Brighton BN1 9QH, E Sussex, England

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2003年 / 15卷 / 44期

关键词：

D O I：

10.1088/0953-8984/15/44/013

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Luminescence signals have been recorded at low temperature during thermal cycling of crystals of RbTiOPO4 (RTP) and KTiOPO4 (KTP) excited by x-rays. In both crystals there are well resolved intense intensity spikes and changes in emission spectra consistent with first-order phase transitions. The transitions are not reversible, except by high temperature annealing. The observations imply that new phases of RTP and KTP can be formed, and in some cases these may relate to nanoparticle-size inclusions. Crystal quality assessment from the luminescence behaviour may have value for non-linear optics. Cathodoluminescence of the RTP surface reveals different emission spectra from the bulk material with consequent implications for usage in surface waveguide devices.

引用

页码：7599 / 7609

页数：11

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