Magnetic properties of Co2C and Co3C nanoparticles and their assemblies
Magnetic properties of Co2C and Co3C nanoparticles and their assemblies
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DOI：
10.1063/1.4733321
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发表时间：
2012-07
影响因子：
4
通讯作者：
K. Carroll;Zachary J. Huba;S. Spurgeon;M. Qian;S. Khanna;Daniel M. Hudgins;M. Taheri;E. Carpenter
中科院分区：
文献类型：
--
作者：
K. Carroll;Zachary J. Huba;S. Spurgeon;M. Qian;S. Khanna;Daniel M. Hudgins;M. Taheri;E. Carpenter
由Co2C和Co3C纳米颗粒组成的纳米复合材料最近被证明具有异常大的矫顽力和能量产物。实验研究可以描述单个相的性质，并提供关于矫顽力和能量积如何随纳米颗粒的大小和组成而变化的信息。研究表明，虽然两相都具有磁性，但Co3C比Co2C具有更高的磁化强度和矫顽力。通过使用GGA+U泛函的第一性原理电子结构研究，我们深入了解了C嵌入对增强各相磁性各向异性的作用。
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.