FINE MAGNETIC PARTICLES IN LAYERED SILICATES AND ZEOLITES

被引：4

作者：

ZHANG, L

MANTHIRAM, A

机构：

[1] Center for Materials Science and Engineering, The University of Texas at Austin, Austin

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1995年 / 31卷 / 06期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1109/20.489771

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Ultrafine Ni particles have been generated at ambient temperatures in clay (montmorillonite) and zeolite (mordenite) matrices. The synthesis involves a reduction in aqueous solutions of the ion-exchanged clay or zeolite with sodium borohydride. SQUID magnetometer measurements reveal single domain Ni particles with superparamagnetic properties. While the Ni particles in clay have a narrow distribution of blocking temperatures T-b and particle size, they seem to have in zeolites a broader distribution of T-b and particle size. Time decay measurements of thermoremanent magnetization also support single domain characteristics.

引用

页码：3784 / 3786

页数：3