Europium doped BaMgF4, an EPR and optical investigation

被引：36

作者：

Rey, JM ^{[1
]}

Bill, H ^{[1
]}

Lovy, D ^{[1
]}

Hagemann, H ^{[1
]}

机构：

[1] Dept Chim Phys, CH-1211 Geneva 4, Switzerland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1998年 / 268卷 / 1-2期

关键词：

EPR; luminescence; BaMgF4; Eu; hydrolysis;

D O I：

10.1016/S0925-8388(97)00606-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Eu2+ was introduced into pure and oxygen codoped BaMgF4 single crystals. A detailed EPR study of this ion (S=7/2) was realized on both types of systems. The result is that only one spectrum was observed involving a strong crystal held. The associated site symmetry of the impurity is C-9. It occupies very closely a Barium lattice site as was established by correlating the EPR results with those of a refined X-ray structure analysis on a Ba0.8Eu0.2MgF4 single crystal realized in our laboratory. The oxygen codoped crystals exhibited this same Eu2+ EPR spectrum (the only one). Optical emission and excitation experiments were performed between 13 000 and 53 000 cm(-1). Theresults due to the Eu2+ impurity are given and discussed qualitatively within the 4f(7) double left right arrow 4f(6)5d(1) scheme. (C) 1998 Elsevier Science S.A.

引用

页码：60 / 65

页数：6

共 17 条

[1]

Abragam A., 1970, ELECT PARAMAGNETIC R

[2] CONCENTRATION AND TEMPERATURE-DEPENDENCE OF DIVALENT EUROPIUM LINE EMISSION IN BAMGF4 [J].