Nanostructure and magnetic properties of CoNi-alloy-based nanoparticles dispersed in a silica matrix

被引：13

作者：

de Julián, C

Sangregorio, C

Mattei, G

Battaglin, G

Cattaruzza, E

Gonella, F

Lo Russo, S

D'Orazio, F

Lucari, F

De, G

Gatteschi, D

Mazzoldi, P

机构：

[1] Univ Padua, Dipartimento Fis, INFM, I-35131 Padua, Italy

[2] Univ Florence, Dipartimento Chim, I-50144 Florence, Italy

[3] Univ Venice, Dipartimento Chim Fis, INFM, I-30123 Venice, Italy

[4] Univ Aquila, Dipartimento Fis, INFM, I-67100 Laquila, Italy

[5] Cent Glass & Ceram Res Inst, Kolkata 700032, W Bengal, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 226卷

关键词：

nanoparticles; alloys; ion implantation method; sol-gel method;

D O I：

10.1016/S0304-8853(00)00660-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A comparative study of the magnetic behavior of FCC alloy CoNi (1 : 1) nanoparticles, embedded in a silica matrix and prepared by the ion implantation and sol-gel techniques, is presented. The blocking temperature is related to the size distribution, and, at least for the ion-implanted samples, only an enhanced effective anisotropy explains the experimental results. The hysteretic behavior is explained in terms of the temperature dependence of the anisotropy and of the particle volume fraction that determines the dipolar interactions. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：1912 / 1914

页数：3