Magnetic Properties of Fe-Pd Alloy Nanoparticles

被引：16
|
作者：
Ito, Yoshikazu [1 ]
Miyazaki, Akira [1 ]
Valiyaveettil, Suresh [2 ]
Enoki, Toshiaki [1 ]
机构：
[1] Tokyo Inst Technol, Dept Chem, Grad Sch Sci & Engn, Meguro Ku, Tokyo 1528551, Japan
[2] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 27期
关键词：
THERMODYNAMIC PROPERTIES; ELECTRONIC-PROPERTIES; COBALT; FERROMAGNETISM; POLARIZATION; CLUSTERS;
D O I：
10.1021/jp910187r
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：
Pd nanoparticles (2 nm in diameter) containing magnetic Fe atoms are prepared and their magnetic properties are investigated. The magnetic moment of the particles is enhanced in the low Fe concentration region and takes a maximum value of 7.6 mu(B) per Fe atom at the concentration in which each Pd nanoparticle contains one Fe atom on average. This giant magnetic moment is explained in terms of the spin polarization on Pd atoms caused by the exchange enhancement mechanism. The magnetization curve shows that these Fe Pd alloy nanoparticles exhibit superparamagnetic behavior, although no blocking behavior in the temperature dependence of the magnetic susceptibility was observed due to the small magnetic anisotropy of Fe.
引用
收藏
页码：11699 / 11702
页数：4
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