Magnetism of diluted Co3O4 nanocrystals

被引：16

作者：

Hayakawa, Y

Kohiki, S ^{[1
]}

Sato, M

Sonda, Y

Babasaki, T

Deguchi, H

Hidaka, A

Shimooka, H

Takahashi, S

机构：

[1] Kyushu Inst Technol, Dept Mat Sci, Kitakyushu, Fukuoka 8048550, Japan

[2] Kyushu Inst Technol, Dept Elect Engn, Kitakyushu, Fukuoka 8048550, Japan

来源：

PHYSICA E | 2001年 / 9卷 / 02期

关键词：

magnetism; nanocrystals; Co3O4;

D O I：

10.1016/S1386-9477(00)00168-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An assembly of Co3O4 nanocrystals dispersed in an amorphous silicate was prepared by calcination of molecular sieve soaked in precursor solution with the concentration of 0.1 mol/l. We observed the disappearance of antiferromagnetic phase transition at 33 K of bulk Co3O4, and frequency dependence of the cusp temperature below 30 K in the AC susceptibility measurement. Divergent peaks at around 18 and 22 K were observed in the nonlinear susceptibility measurement, implying that the sample is in the spin-glass phase. The magnetic interparticle interactions were collective for the Co3O4 nanocrystals dispersed in nonmagnetic silicate. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：250 / 252

页数：3

共 4 条

[1] PARTICLE SIZE DETERMINATION FROM X-RAY LINE BROADENING [J].