Magnetic resonance of magnetite nanoparticles dispersed in mesoporous copolymer matrix

被引：16

作者：

Morais, PC ^{[1
]}

Lima, ECD

Rabelo, D

Reis, AC

Pelegrini, F

机构：

[1] Univ Brasilia, Nucleo Fis Aplicada, Inst Fis, BR-70919970 Brasilia, DF, Brazil

[2] Univ Fed Goias, Inst Quim, BR-74001970 Goiania, Go, Brazil

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2000年 / 36卷 / 05期

关键词：

magnetic resonance; magnetocrystalline anisotropy; nanocrystalline materials; polymers;

D O I：

10.1109/20.908670

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Magnetic resonance is used to investigate fine particles of magnetite (Fe3O4) synthesized as isolated nanoparticles (INP's) in a mesoporous styrene-divinylbenzene (Sty-DVB) copolymer template, The magnetite nanoparticles were obtained through alkaline precipitation of ferrous sulfate, at different iron (II) concentration (Q), in the sulfonated polymeric matrix. Analysis of the temperature (T) dependence of the resonance field (H-R) and resonance linewidth (DeltaH(R)) provide a useful way to estimate the average size of the magnetite nanoparticles. The resonance data indicates that the nanoparticle average diameter (D) increases as Q increases, in accordance with the data reported previously.

引用

页码：3038 / 3040

页数：3

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