Chemical synthesis and L12 ordering of CrPt3 nanoparticles

被引：4
|
作者：
Tomou, A. [1 ]
Panagiotopoulos, I. [1 ]
Tzitzios, V. [2 ]
Li, Wanfeng [3 ]
Hadjipanayis, G. C. [3 ]
机构：
[1] Univ Ioannina, Dept Mat Sci & Engn, GR-45110 Ioannina, Greece
[2] NCSR Demokritos, Inst Mat Sci, Athens 15310, Greece
[3] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2013年 / 334卷
关键词：
Nanoparticle; Pt3Cr; Chemical ordering; L12; ordering;
D O I：
10.1016/j.jmmm.2013.01.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cr-Pt nanoparticles of different compositions around the ferrimagnetic Pt3Cr have been synthesized with the thermolytic method and proper adjustment of the Pt(acac)(2) and Cr(acac)(2) mole ratios. The as prepared particles have a size of (5.5 +/- 1.0) nm but after heat-treatment at 850 degrees C for 2 h an inhomogeneous microstructure consisting of clustered nanoparticles with variable sizes 5-50 nm is obtained. Chemical ordering to the L1(2) phase up to S=0.83 has been achieved for the nanoparticles with optimized stoichiometry while moderate coercivity values up to 380 Oe are achieved. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：107 / 110
页数：4
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