MAGNETIC-PROPERTIES OF CU-DOPED POROUS SILICA-GELS STUDY BY MAGNETIC RESONANCES

被引：9

作者：

DUVAL, E

BOVIER, C

ROUX, H

SERUGHETTI, J

TUEL, A

WICKER, G

机构：

[1] UNIV LYON 1, DEPT PHYS MAT, CNRS, URA 172, F-69622 VILLEURBANNE, FRANCE

[2] INST RECH CATALYSE, CNRS, F-69622 VILLEURBANNE, FRANCE

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1995年 / 189卷 / 1-2期

关键词：

D O I：

10.1016/0022-3093(95)00223-5

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Silica gels doped with copper have been examined, after different heat treatments, by electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR). A strong decrease of the CU2+ EPR signal was observed for samples heated for 2 h at 650 degrees C. After the same heat treatment, relatively intense sidebands due to the spinning at the magic angle appeared 19 on each side of the (29)SiNMR central line. These indicate a large broadening of the NMR lines, which confirm the recently observed ferromagnetism originating from CU2+ ions.

引用

页码：101 / 106

页数：6

共 13 条

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