Influence of size distribution and field amplitude on specific loss power

被引：28

作者：

Boskovic, M. ^{[1
]}

Goya, G. F. ^{[2
]}

Vranjes-Djuric, S. ^{[1
]}

Jovic, N. ^{[1
]}

Jancar, B. ^{[3
]}

Antic, B. ^{[1
]}

机构：

[1] Univ Belgrade, Vinca Inst Nucl Sci, Belgrade 11001, Serbia

[2] Univ Zaragoza, INA, Zaragoza 50018, Spain

[3] Jozef Stefan Inst, Ljubljana 1000, Slovenia

来源：

JOURNAL OF APPLIED PHYSICS | 2015年 / 117卷 / 10期

关键词：

HEATING EFFICIENCY; NANOPARTICLES; MAGNETITE; HYPERTHERMIA; PARAMETERS; PARTICLES;

D O I：

10.1063/1.4914074

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Herein we present the results of specific loss power (SLP) analysis of polydisperse water based ferrofluids, Fe3O4/PEG200 and Fe3O4/PEG6000, with average Fe3O4 particle size of 9 nm and 11 nm, respectively. Specific loss power was measured in alternating magnetic field of various amplitudes and at fixed frequency of 580.5 kHz. Maximum SLP values acquired were 195 W/g for Fe3O4/PEG200 and 60 W/g for Fe3O4/PEG6000 samples. The samples were labeled as superparamagnetic by magnetization measurements, but SLP field dependence showed deviation from the behavior predicted by the commonly employed linear response theory. The scope of this theory for both samples with wide particle size distribution is discussed. Deviation from the expected behavior is explained by referring to polydisperse nature of the samples and field dependent relaxation rates. (C) 2015 AIP Publishing LLC.

引用

页数：6

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