Magnetic hyperthermia in single-domain monodisperse FeCo nanoparticles: Evidences for Stoner-Wohlfarth behavior and large losses

被引：123
作者：
Lacroix, L. -M. [1 ,2 ]
Malaki, R. Bel [1 ,2 ]
Carrey, J. [1 ,2 ]
Lachaize, S. [1 ,2 ]
Respaud, M. [1 ,2 ]
Goya, G. F. [3 ]
Chaudret, B. [4 ]
机构：
[1] Univ Toulouse, UPS, INSA, LPCNO, F-31077 Toulouse, France
[2] CNRS, LPCNO, UMR 5215, F-31077 Toulouse, France
[3] Univ Zaragoza, INA, E-50009 Zaragoza, Spain
[4] CNRS, Chim Coordinat Lab, F-31077 Toulouse 4, France
来源：
JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 02期
关键词：
biomagnetism; cobalt alloys; coercive force; colloids; ferromagnetic materials; hyperthermia; iron alloys; magnetic domains; magnetic hysteresis; magnetic particles; nanoparticles; nanotechnology; PARTICLE HYPERTHERMIA; HYSTERESIS; FIELD; SIZE;
D O I：
10.1063/1.3068195
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on hyperthermia measurements on a colloidal solution of 14.2 +/- 1.5 nm monodisperse FeCo nanoparticles (NPs). Losses as a function of the magnetic field display a sharp increase followed by a plateau, which is what is expected for losses of ferromagnetic single-domain NPs. The frequency dependence of the coercive field is deduced from hyperthermia measurement and is in quantitative agreement with a simple model of noninteracting NPs. The measured losses (1.5 mJ/g) compare to the highest of the literature, although the saturation magnetization of the NPs is well below the bulk one.
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页数：4
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