Microwave characterization of magnetically hard and soft ferrite nanoparticles in K-band

被引：6

作者：

Della Pina, C. ^{[1
]}

Falletta, E. ^{[1
]}

Ferretti, A. M. ^{[2
]}

Ponti, A. ^{[2
]}

Gentili, G. G. ^{[3
]}

Verri, V. ^{[3
]}

Nesti, R. ^{[4
]}

机构：

[1] Univ Milan, Dipartimento Chim, Unita ISTM CNR, Milan, Italy

[2] CNR, Ist Sci & Tecnol Mol, Lab Nanotecnol, I-20138 Milan, Italy

[3] Politecn Milan, Dipartimento Elettron Informaz & Bioingn, I-20133 Milan, Italy

[4] Ist Nazl Astrofis, Florence, Italy

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 116卷 / 15期

关键词：

ELECTROMAGNETIC-WAVE ABSORPTION; NATURAL RESONANCE FREQUENCY; EFFECTIVE PERMITTIVITY; ABSORBING PROPERTIES; FE3O4; NANOCOMPOSITE; POLYANILINE; COMPOSITES; RELAXATION;

D O I：

10.1063/1.4898138

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nano-sized magnetic particles show great promise in improving the performance of microwave absorbers with respect to the corresponding bulk materials. In this paper, magnetically hard and soft ferrite nanoparticles (CoFe2O4 and Fe3O4) having an average size of 14 and 11 nm were prepared by co-precipitation method and characterized in terms of morphology, structure, and magnetic properties. Their permeability and permittivity were measured by a waveguide technique, embedding each sample in a host medium. Their parameters at microwave frequencies were retrieved by comparing different effective medium equations. (C) 2014 AIP Publishing LLC.

引用

页数：8

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