Optical studies of nanoscale materials incorporated in the space of zeolite crystals

被引：22
|
作者：
Ikemoto, Y
Nakano, T
Nozue, Y
Terasaki, O
Qiu, S
机构：
[1] TOHOKU UNIV,INTERDISCIPLINARY RES CTR,SENDAI,MIYAGI 98077,JAPAN
[2] JILIN UNIV,DEPT CHEM,CHANGCHUN 130023,PEOPLES R CHINA
来源：
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1997年 / 48卷 / 1-2期
关键词：
cluster; ferrimagnetism; ferromagnetism; LTA; MOR; potassium; zeolite;
D O I：
10.1016/S0921-5107(97)00090-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Optical spectroscopy is used for the characterization of the quantum electronic state of nanoscale materials incorporated in zeolite crystals. Alkali metal clusters generated in zeolite exhibit interesting phenomena in optical properties as well as magnetic ones. Potassium clusters incorporated in zeolite LTA have shown ferromagnetism at low temperatures. The origin of the ferromagnetism was explained by the itinerant electron model. The infrared spectrum and magnetization curves, however, suggest that the itinerant electron model is not applicable to the ferromagnetism. Magnetic properties are interpreted based on the model of ferrimagnetism. Polarized micro-optical spectroscopy suggests the possibility of the one-dimensional array of potassium clusters in zeolite MOR single crystal. (C) 1997 Elsevier Science S.A.
引用
收藏
页码：116 / 121
页数：6
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