OPTICAL AND MAGNETIC-PROPERTIES OF ALKALI-METAL IN ZEOLITE

被引:8
作者
GOTO, T
NOZUE, Y
KODAIRA, T
机构
[1] Department of Physics, Faculty of Science, Tohoku University, Aoba-ku, Sendai, 980, Aramaki Aoba
来源
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1993年 / 19卷 / 1-2期
关键词
D O I
10.1016/0921-5107(93)90164-I
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Absorption spectra of Linde type A zeolite containing cages loaded with alkali metals Na and K were measured at room temperature. Two kinds of bands appear which are assumed to be due to an electron-hole pair excitation and a surface plasmon-like formation of the alkali metal cluster in the cage. In the sample containing the K metal cluster, an a.c. magnetic susceptibility was measured as functions of temperature and external magnetic field. A very large susceptibility was obtained at around 3 K in zeolite with a medium K concentration corresponding to 4 electrons per supercage on average. The temperature and external magnetic field dependences strongly suggest that this sample becomes ferromagnetic below about 4 K.
引用
收藏
页码:48 / 52
页数:5
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