Hydrothermal doping of cobalt and magnetic properties in gamma iron oxide thin films

被引：3

作者：

Chen, QW

Li, XG

Qian, YT

Zhang, YH

机构：

[1] UNIV SCI & TECHNOL CHINA,ACAD SINICA,STRUCT RES LAB,BEIJING,PEOPLES R CHINA

[2] CTR ADV STUDIES SCI & TECHNOL MICROSTRUCT,NANJING 210093,PEOPLES R CHINA

[3] CCAST,WORLD LAB,BEIJING 100080,PEOPLES R CHINA

来源：

MATERIALS LETTERS | 1997年 / 31卷 / 3-6期

关键词：

hydrothermal doping; cobalt; magnetic; gamma iron oxide; thin films;

D O I：

10.1016/S0167-577X(96)00275-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High coercivity (3.1 kOe) cobalt-doped gamma iron oxide (gamma-Fe2O3) thin films have been prepared by hydrothermal deposition of Fe3O4 followed by oxidation in air. Films deposited by hydrothermal treatment of a mixed solution of Fe(NO3)(3) . 9H(2)O and CoCl2 . 6H(2)O in the presence of reduced iron powder at 140 degrees C for 6 h have the Fe3O4 phase. Controlled oxidation in air at 400 degrees C for 2 h leads to the formation of gamma-Fe2O3 phase. The magnetic properties are enhanced, which is thought to be the result of well-crystallized acicular grains and uniform distribution of cobalt ions in the grains because of hydrothermal doping.

引用

页码：247 / 250

页数：4

共 14 条

[1] FERRITE PLATING IN AQUEOUS-SOLUTION - NEW TECHNIQUE FOR PREPARING MAGNETIC THIN-FILM [J].