Annealing of amorphous FexCo100-x nanoparticles synthesized by a modified aqueous reduction using NaBH4

被引：11

作者：

Carroll, K. J. ^{[1
]}

Hudgins, D. M. ^{[1
]}

Brown, L. W., III ^{[1
]}

Yoon, S. D. ^{[2
]}

Heiman, D. ^{[3
]}

Harris, V. G. ^{[2
]}

Carpenter, E. E. ^{[1
]}

机构：

[1] Virginia Commonwealth Univ, Dept Chem, Richmond, VA 23284 USA

[2] Northeastern Univ, Ctr Microwave Magnet Mat & Integrated Circuits, Boston, MA 02115 USA

[3] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 09期

关键词：

MAGNETIC-PROPERTIES; FECO NANOPARTICLES; PARTICLES; CO;

D O I：

10.1063/1.3334172

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

FexCo100-x nanoparticles were synthesized by aqueous reduction in iron (II) sulfate and cobalt (II) sulfate using sodium borohydride and sodium citrate. The initial concentrations of iron and cobalt were varied while maintaining an overall metal concentration of 4.60 mM. Increasing the cobalt content from 0 to 100 at. % decreased the magnetization saturation from 152 to 48 emu/g, as determined by room temperature vibrating sample magnetometry. Annealing the samples at 450 and 600 degrees C showed an increase in crystallite size. Powder x-ray diffraction and transmission electron microscopy was performed to determine the phases and morphology of the materials. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3334172]

引用

页数：3

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