QQ客服 官方微博 反馈留言

	Formation mechanism of cr4+ ions in pbwo4 single crystals
	Li, WF; Feng, XQ; Kan, YM
刊名	Physical review b
	2005-03-01
卷号	71期号:10页码:6
ISSN号	1098-0121
DOI	10.1103/physrevb.71.104101
通讯作者	Li, wf(xqfeng@sunm.shcnc.ac.cn)
英文摘要	The behaviors of cr ions in heavily cr-doped and cr, la-codoped pbwo4 crystals are studied by structural, optical and dielectric methods, which demonstrate the interaction between defects in pbwo4 (pwo). for la-free sample, it shows a double-doping process that cr enters the pwo predominantly as cr3+ at the pb site and a small part as cr4+ at the w site. the (cr-pb(3+)) is achieved at expense of large lattice relaxation. two dielectric relaxation peaks are observed and their activation energies e-alpha=0.61 +/- 0.02 and e-beta=0.46 +/- 0.01, are determined, which are attributed to [2(cr-pb(3+))-(v-pb)(')] and [2(cr-pb(3+))-(cr-w(4+))(')] associations, respectively. the remarkable increase of cr4+ in pwo due to the co-addition of la3+ is reflected by the optical absorption spectra on the ground that la3+ is supposed to preferentially occupy the pb site and cr is forced into the w site as cr4+. as a result, (v-pb)(') defects are dramatically suppressed and the observed dielectric relaxation is ascribed to [2(la-pb(3+))-(cr-w(4+))(')] clusters with an activation energy of 0.35 +/- 0.02 ev.
WOS关键词	CHROMIUM-DOPED FORSTERITE ; SCINTILLATION CHARACTERISTICS ; IMPEDANCE SPECTROSCOPY ; RADIATION HARDNESS ; COLOR-CENTERS ; LASER ACTION ; LA ; THERMOLUMINESCENCE ; IMPROVEMENT ; CR-4+
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
语种	英语
出版者	AMERICAN PHYSICAL SOC
WOS记录号	WOS:000228065400017
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2377223
专题	中国科学院大学
通讯作者	Li, WF
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Li, WF,Feng, XQ,Kan, YM. Formation mechanism of cr4+ ions in pbwo4 single crystals[J]. Physical review b,2005,71(10):6.
APA	Li, WF,Feng, XQ,&Kan, YM.(2005).Formation mechanism of cr4+ ions in pbwo4 single crystals.Physical review b,71(10),6.
MLA	Li, WF,et al."Formation mechanism of cr4+ ions in pbwo4 single crystals".Physical review b 71.10(2005):6.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。