Magnetic properties of Co2C and Co3C nanoparticles and their assemblies

被引：70

作者：

Carroll, Kyler J. ^{[1
,2
]}

Huba, Zachary J. ^{[1
]}

Spurgeon, Steven R. ^{[3
]}

Qian, Meichun ^{[4
]}

Khanna, Shiv N. ^{[4
]}

Hudgins, Daniel M. ^{[1
]}

Taheri, Mitra L. ^{[3
]}

Carpenter, Everett E. ^{[1
]}

机构：

[1] Virginia Commonwealth Univ, Dept Chem, Richmond, VA 23284 USA

[2] Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USA

[3] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

[4] Virginia Commonwealth Univ, Dept Phys, Richmond, VA 23284 USA

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 01期

基金：

美国国家科学基金会;

关键词：

FISCHER-TROPSCH REACTION; ULTRASOFT PSEUDOPOTENTIALS; COBALT; NANOWIRES; CATALYSTS; IRON; STABILITY; MECHANISM; CEMENTITE; CARBIDES;

D O I：

10.1063/1.4733321

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nano-composite material consisting of Co2C and Co3C nanoparticles has recently been shown to exhibit unusually large coercivities and energy products. Experimental studies that can delineate the properties of individual phases have been undertaken and provide information on how the coercivities and the energy product change with the size and composition of the nanoparticles. The studies indicate that while both phases are magnetic, the Co3C has higher magnetization and coercivity compared to Co2C. Through first principles electronic structure studies using a GGA+U functional, we provide insight on the role of C intercalation on enhancing the magnetic anisotropy of the individual phases. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4733321]

引用

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