Direct synthesis of fct-structured FePt nanoparticles at low temperature with assistance of poly(N-vinyl-2-pyrrolidone)

被引：31

作者：

Iwamoto, Takashi

Matsumoto, Kinya

Kitamoto, Yoshitaka

Toshima, Naoki

机构：

[1] Tokyo Inst Technol, Dept Innovat & Engineered Mat, Midori Ku, Kanagawa 2268502, Japan

[2] Tokyo Univ Sci, Dept Mat Sci & Environm Engn, Yamaguchi 7560884, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2007年 / 308卷 / 02期

关键词：

FePt nanoparticles; direct synthesis; poly(N-vinyl-2-pyrrolidone); XRD pattern; fct-structure; phase transformation; coercivity; ferromagnetism;

D O I：

10.1016/j.jcis.2007.01.049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Direct synthesis of fct-structured FePt nanoparticles was successfully achieved by using poly(N-vinyl-2-pyrrolidone) as a protective reagent at lower temperature than the case using low molecular weight ligands as a protective reagent. Experimental data suggest that a transformation of FePt nanoparticles from face-centered cubic to face-centered tetragonal (fct) structure takes place at reaction temperature of 261 degrees C. The results of XRD and the magnetic properties exhibit that the FePt nanoparticles synthesized at 261 degrees C have partially ordered fct-structure and a ferromagnetic behavior at room temperature. (c) 2007 Elsevier Inc. All rights reserved.

引用

页码：564 / 567

页数：4

共 19 条

[1] Silica encapsulation and magnetic properties of FePt nanoparticles [J].