MAGNETOOPTICAL PROPERTIES OF CD1-XMNXSE MICROCRYSTALLITES IN SIO2 GLASS PREPARED BY RF-SPUTTERING

被引:50
作者
YANATA, K
SUZUKI, K
OKA, Y
机构
[1] Research Institute for Scientific Measurements, Tohoku University, Aobaku, Sendai 980
关键词
D O I
10.1063/1.352750
中图分类号
O59 [应用物理学];
学科分类号
摘要
Cd1-xMnxSe microcrystallites have been successfully prepared by rf sputtering in SiO2 matrix glass. Optical absorption edge shows high energy shifts of 20-550 meV to the high energy as compared to its position in bulk crystals; these shifts are interpreted as evidence for exciton confinement in the microcrystallites. Annealing of the Cd1-xMnxSe microcrystallites at 450-650-degrees-C for 0.5-5 h increases the size of the microcrystallites from 20 to 250 angstrom. In an external magnetic field of 7 T the absorption edge shifts by 40 meV towards the low energy side due to the exchange coupling of the excitons with the d electrons of Mn2+ ions in the Cd1-xMnxSe microcrystallites. The spectral red shifts of the exciton luminescence in the Cd1-xMnxSe microcrystallites are also observed in the presence of magnetic fields. The corresponding effective g value varied from 138 at 1 T to 99 at 7 T.
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页码:4595 / 4598
页数:4
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