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

页码：48 / 52

页数：5