Monte Carlo simulation of Fe-Co amorphous nanoparticles magnetization

被引：10

作者：

Molina Concha, B. ^{[1
]}

De Biasi, E. ^{[1
,2
]}

Zysler, R. D. ^{[1
]}

机构：

[1] Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil

来源：

PHYSICA B-CONDENSED MATTER | 2008年 / 403卷 / 2-3期

基金：

巴西圣保罗研究基金会;

关键词：

ferromagnetic nanoparticles; surface effects; Monte Carlo simulation; magnetization measurements;

D O I：

10.1016/j.physb.2007.08.057

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetization simulations of similar to 3 nm non-interacting Fe-Co ferromagnetic amorphous nanoparticles were made using Metropolis algorithm of Monte Carlo method. The results of core-shell model simulations describe the nanoparticles as a ferromagnetically ordered core and a disordered surface shell. They fairly reproduce the significant features observed in 3 nm Fe-Co-B nanoparticles experimental magnetization measurement at the same Fe-Co composition. They also provide a clear evidence of the role played by the local surface anisotropy and the surface-core exchange interaction in determining the magnetic properties of the nanoparticles. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：390 / 393

页数：4

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