Magnetic properties of non-interacting Fe-C nanoparticles

被引：7

作者：

Hansen, MF

Bodker, F

Morup, S

Djurberg, C

Svedlindh, P

机构：

[1] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark

[2] Univ Uppsala, Dept Mat Sci, S-75121 Uppsala, Sweden

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1998年 / 177卷

关键词：

amorphous systems alloys; ferrofluids-frozen; particles-ultrafine; relaxation-Neel; superparamagnetism;

D O I：

10.1016/S0304-8853(97)00751-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A series of ferrofluids containing 4.7 nm particles of amorphous Fe1-xCx with an extremely narrow size distribution and a wide range of concentrations has been prepared. A dilute ferrofluid has been studied by electron microscopy, Mossbauer spectroscopy and zero field cooled magnetisation measurements, Assuming the Neel law for the superparamagnetic relaxation time, we have estimated tau(0) = 2 x 10(-11) s and K = 1.4 x 10(5) Jm(-3). (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：928 / 930

页数：3

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