Composition Dependent Magnetic Properties of Ni-Co-P Coated Carbon Nanotubes  

镍钴磷包覆的碳纳米管与成分关联的磁性能

作　　者：叶敏[1,2] 解挺[1,2] 何宝临[3] 吴玉程[1,3] 孟国文[1] 张立德[1] 

机构地区：[1]中国科学院固体物理研究所材料物理重点实验室,合肥230031 [2]合肥工业大学摩擦学研究所,合肥230009 [3]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《Chinese Journal of Chemical Physics》2009年第4期411-416,448,共7页化学物理学报（英文）

基　　金：ACKNOWLEDGMENTS This work was supported by Project of Fundamental Research the National Major Nanomaterials and Nanostructures （No.2005CB623603） and the National Natural Science Foundation of China （No.10674138）.

摘　　要：Carbon nanotubes were coated with a layer of nickel-cobalt-phosphorus （Ni-Co-P） alloy with different compositions of Ni/Co through electroless plating. The effects of the concentration ratio of Co^2＋ to Ni^2＋, bath temperature, and pH on deposition rate are discussed. The prepared carbon nanotubes covered with Ni-Co-P were characterized and analyzed by fieldemission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy dispersive spectroscopy, and a vibrating sample magnetometer. The results show that the deposition rate reached the maximum when the concentration ratio of Co^2＋ to Ni^2＋ is 1 and the pH is 9; the deposition rate increases with the increase of bath temperature. The measurements of the magnetic properties of the obtained carbon nanotubes covered with Ni-Co-P indicate that the magnetic properties greatly depend on the concentration ratio of Co^2＋ to Ni^2＋, and the magnetic saturation reaches the maximum value when the Co^2＋ to Ni^2＋ ratio is 1. In addition, there are two peaks in the coercivity curve at Co^2＋ to Ni^2＋ ratios of 1/2 and 4/1, while the two peaks in the magnetic conductivity curve are located at Co^2＋ to Ni^2＋ ratios of 1/4 and 4/1.

关 键 词：Ni-Co-P Carbon nanotube Electroless plating COMPOSITION Magnetic property 

分 类 号：TM273[一般工业技术—材料科学与工程] TB383[电气工程—电工理论与新技术]