Fabrication, structure and magnetic properties of CoPt3, CoPt and Co3Pt nanoparticles

TitleFabrication, structure and magnetic properties of CoPt3, CoPt and Co3Pt nanoparticles
Publication TypeJournal Article
Year of Publication2012
AuthorsWang, Y, Zhang, X, Liu, Y, Jiang, Y, Zhang, Y, Wang, J, Liu, Y, Liu, H, Sun, Y, Beach, GSD, Yang, J
JournalJournal of Physics D-Applied Physics
Volume45
Issue48
Pagination485001
Date Published2012/12/05/
Abstract

A set of CoxPt100-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 Co3Pt NPs. Magnetic measurements indicated that CoPt3 and Co3Pt had soft magnetic properties. When the Co composition was 50 at%, the sample coercivity reached a giant value of similar to 470 kAm(-1).