高分辨率透射电子显微镜
选区衍射
矫顽力
材料科学
透射电子显微镜
纳米颗粒
电子衍射
结晶学
衍射
分析化学(期刊)
纳米技术
化学
凝聚态物理
光学
物理
色谱法
作者
Yaxin Wang,Xiaolong Zhang,Yang Liu,Yuhong Jiang,Yongjun Zhang,Jingshu Wang,Yanqing Liu,Huilian Liu,Yunfei Sun,Geoffrey S. D. Beach,Jing Yang
标识
DOI:10.1088/0022-3727/45/48/485001
摘要
Abstract A set of Co x Pt 100− x nanoparticles (NPs) was synthesized by the sol–gel method. The structure and magnetic properties of the produced samples were investigated by x-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED) and a vibrating sample magnetometer. When the Co content ranged from 25 to 75 at%, the results of XRD, HRTEM and SAED revealed the formation of L1 2 CoPt 3 , L1 0 CoPt and face-centred cubic Co 3 Pt NPs. Magnetic measurements indicated that CoPt 3 and Co 3 Pt had soft magnetic properties. When the Co composition was 50 at%, the sample coercivity reached a giant value of ∼470 kA m −1 .
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