From Core/Shell Structured FePt/Fe3O4/MgO to Ferromagnetic FePt Nanoparticles

被引：111

作者：

Kim, Jaemin ^{[1
]}

Rong, Chuanbing ^{[2
]}

Lee, Youngmin ^{[1
]}

Liu, J. Ping ^{[2
]}

Sun, Shouheng ^{[1
]}

机构：

[1] Brown Univ, Dept Chem, Providence, RI 02912 USA

[2] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 23期

关键词：

D O I：

10.1021/cm8024878

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：

This paper reports an improved synthesis of hard magnetic fct-FePt nanoparticles (NPs) from reductive annealing of fcc-FePt/Fe3O4/MgO NPs followed by MgO removal. The fcc-FePt/Fe3O4 NPs are made by a one-pot reaction of Pt(acac)(2) with Fe(CO)(5) in the presence of oleic acid and oleylamine and are coated with a layer of MgO via the thermal decomposition of Mg(acac)(2). The MgO coating prevents FePt from sintering under high temperature reductive annealing conditions. The fct-FePt NPs obtained from the 650 degrees C annealing of the fcc-FePt/Fe3O4/MgO NPs show a coercivity value of 2 T at 300 K, suitable for various nanomagnetic applications.

引用

收藏

页码：7242 / 7245

页数：4

相关论文

共 37 条

[1] Enhanced orbital magnetism in Fe50Pt50 nanoparticles [J].

Antoniak, C. ;

Lindner, J. ;

Spasova, M. ;

Sudfeld, D. ;

Acet, M. ;

Farle, M. ;

Fauth, K. ;

Wiedwald, U. ;

Boyen, H. -G. ;

Ziemann, P. ;

Wilhelm, F. ;

Rogalev, A. ;

Sun, Shouheng .

PHYSICAL REVIEW LETTERS, 2006, 97 (11)

[2] One-step synthesis of FePt nanoparticles with tunable size [J].

Chen, M ;

Liu, JP ;

Sun, SH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (27) :8394-8395

[3] Electrocatalytic reduction of oxygen by FePt alloy nanoparticles [J].

Chen, Wei ;

Kim, Jaemin ;

Sun, Shonheng ;

Chen, Shaowei .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (10) :3891-3898

[4] Composition effects of FePt alloy nanoparticles on the electro-oxidation of formic acid [J].

Chen, Wei ;

Kim, Jaemin ;

Sun, Shouheng ;

Chen, Shaowei .

LANGMUIR, 2007, 23 (22) :11303-11310

[5] Langmuir-blodgett thin films of Fe20Pt80 nanoparticles for the electrocatalytic oxidation of formic acid [J].

Chen, Wei ;

Kim, Jaemin ;

Xu, Li-Ping ;

Sun, Shouheng ;

Chen, Shaowei .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (36) :13452-13459

[6] Phase transformation, coalescence, and twinning of monodisperse FePt nanocrystals [J].

Dai, ZR ;

Sun, SH ;

Wang, ZL .

NANO LETTERS, 2001, 1 (08) :443-447

[7]

Elkins KE, 2003, NANO LETT, V3, P1647, DOI 10.1021/nl034743w

[8] Multifunctional yolk-shell nanoparticles: A potential MRI contrast and anticancer agent [J].

Gao, Jinhao ;

Liang, Gaolin ;

Cheung, Jerry S. ;

Pan, Yue ;

Kuang, Yi ;

Zhao, Fan ;

Zhang, Bei ;

Zhang, Xixiang ;

Wu, Ed X. ;

Xu, Bing .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (35) :11828-11833

[9] Effect of metal additives on L10 ordering of chemically synthesized FePt nanoparticles [J].

Harrell, JW ;

Nikles, DE ;

Kang, SS ;

Sun, XC ;

Jia, Z ;

Shi, S ;

Lawson, J ;

Thompson, GB ;

Srivastava, C ;

Seetala, NV .

SCRIPTA MATERIALIA, 2005, 53 (04) :411-416

[10]

J I. Gersten, 2001, PHYS CHEM MAT

← 1 2 3 4 →