Measurements of defect structures by positron annihilation lifetime spectroscopy of the tellurite glass TeO2-P2O5-ZnO-LiNbO3 doped with ions of rare earth elements: Er3+, Nd3+ and Gd3+

被引:10
作者
Golis, E. [1 ]
Yousef, El. S. [2 ,3 ]
Reben, M. [4 ]
Kotynia, K. [5 ]
Filipecki, J. [1 ]
机构
[1] Jan Dlugosz Univ Czestochowa, Inst Phys, PL-42200 Czestochowa, Poland
[2] King Khalid Univ, Fac Sci, Dept Phys, Abha, Saudi Arabia
[3] Al Azhar Univ, Fac Sci, Assiut Branch, PhysicsDept, Assiut, Egypt
[4] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, PL-30059 Krakow, Poland
[5] Czestochowa Tech Univ, Inst Phys, PL-42200 Czestochowa, Poland
关键词
Positron annihilation; Tellurite glasses; Structural defects; Rare earth ions; OXIDE GLASSES;
D O I
10.1016/j.solidstatesciences.2015.10.017
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The objective of the study was the structural analysis of the TeO2-P2O5-ZnO-LiNbO3 tellurite glasses doped with ions of the rare-earth elements: Er3+, Nd3+ and Gd3+ based on the PALS (Positron Annihilation Lifetime Spectroscopy) method of measuring positron lifetimes. Values of positron lifetimes and the corresponding intensities may be connected with the sizes and number of structural defects, such as vacancies, mono-vacancies, dislocations or pores, the sizes of which range from a few angstroms to a few dozen nanometres. Experimental positron lifetime spectrum revealed existence of two positron lifetime components tau(1) and tau(2). Their interpretation was based on two-state positron trapping model where the physical parameters are the annihilation velocity and positron trapping rate. (C) 2015 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码:81 / 84
页数:4
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