中文摘要：

利用溶胶-凝胶法制备CoPt, CoPt-Au纳米颗粒.并对制备的样品（ CoPt, CoPt-Au纳米颗粒）的结构、形貌以及磁学性能进行了表征. X 射线衍射（XRD）结果表明,700℃时,CoPt, CoPt-Au纳米颗粒均为面心四方结构（FCT）的L10 相.透射电子显微镜（ TEM）结果表明,CoPt较CoPt-Au的颗粒尺寸小,说明了Au掺杂可能促进了CoPt纳米颗粒的尺寸生长.振动样品磁强计（ VSM）结果显示,CoPt-Au较CoPt的矫顽力大,说明一定量的Au元素掺杂可以促进CoPt纳米颗粒磁性的增长.

英文摘要：

CoPt and CoPt-Au nanoparticles are fabricated by Sol-gel method. Structure,morphology and magnetic properties of CoPt,CoPt-Au were characterized. X-ray diffraction （ XRD） results show that CoPt,CoPt-Au were faced centered tetragonal structure（ FCT） at 700℃. Transmission electron microscopy （ TEM） results indicate that the CoPt-Au nano-particle has the larger size than CoPt. It means that Au could promote the growth of CoPt nanoparticles. The result of vibrating sample magnetometer （ VSM） indicates that the pure CoPt nanoparticles has the smaller coercivity than CoPt-Au nanoparticles. It indicates that the addition of Au could improve the magnetism of CoPt nanoparticles.