LUMINESCENCE FROM PURE MNF2 AND FROM MNF2 DOPED WITH EU3+ AND ER3+

被引:68
作者
WILSON, BA
YEN, WM
HEGARTY, J
IMBUSCH, GF
机构
[1] UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706
[2] NATL UNIV IRELAND UNIV COLL GALWAY,DEPT PHYS,GALWAY,IRELAND
来源
PHYSICAL REVIEW B | 1979年 / 19卷 / 08期
关键词
D O I
10.1103/PhysRevB.19.4238
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper we report fluorescence measurements made over a range of temperatures on nominally pure and on Er- and Eu-doped MnF2. By studying the weak intrinsic fluorescence in nominally pure samples we can draw some conclusions about exciton decay and energy-transfer processes. The decay rate of the E1 excitons is dominated by transfer to traps and depends strongly on temperature, exhibiting an activation behavior proceeding through a higher-E2 state. In the rare-earth-doped crystals the optical excitation energy is shared between the Mn traps and the rare-earth ions. As the temperature is raised the excitation is redistributed between the rare-earth ions and the effective Mn traps leading to a temperature-dependent variation in the fluorescence spectra from these crystals. © 1979 The American Physical Society.
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页码:4238 / 4250
页数:13
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