Thermal magnetic noise spectra of nanoparticle ensembles

被引：14
|
作者：
Leliaert, J. [1 ,2 ]
Coene, A. [2 ]
Liebl, M. [3 ]
Eberbeck, D. [3 ]
Steinhoff, U. [3 ]
Wiekhorst, F. [3 ]
Fischer, B. [4 ]
Dupre, L. [2 ]
Van Waeyenberge, B. [1 ]
机构：
[1] Univ Ghent, Dept Solid State Sci, B-9000 Ghent, Belgium
[2] Univ Ghent, Dept Elect Energy Syst & Automat, B-9052 Zwijnaarde, Belgium
[3] Phys Tech Bundesanstalt, D-10587 Berlin, Germany
[4] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany
来源：
APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 22期
关键词：
MAGNETORELAXOMETRY; PARTICLE; HYPERTHERMIA; DOMAIN; SIZE;
D O I：
10.1063/1.4936890
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Typically, the dynamic behaviour of magnetic nanoparticles is investigated by measuring their response to externally applied magnetic fields. In contrast, we present a study of the magnetic fluctuations in an ensemble of magnetic nanoparticles recorded in the absence of any external excitation. Several samples of magnetic nanoparticles with varying particle size, composition, and environment were investigated. We interpret the thermal magnetic noise spectrum to estimate particle size distributions and compare these to the distributions derived from magnetorelaxometry measurements of the same samples. (C) 2015 AIP Publishing LLC.
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页数：5
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