Document Type
Article
Source Publication Title
Applied Physics Letters
Abstract
FePt nanoparticles with a size of 3 nm and thermally stable room-temperature ferromagnetism are investigated. The monodisperse nanoparticles were prepared by chemical synthesis and a salt-matrix annealing technique. Structural and magnetic characterizations confirmed the phase transition from the disordered face-centered cubic structure to the L10 structure with the chemical ordering parameter of 0.62±0.05. Analysis in blocking temperature and fitting of temperature dependence of switching field reveals that the transformed 3 nm nanoparticles have a magnetic anisotropy constant of (2.8±0.2)×106 J/m3, smaller than those for the bigger particles and the fully ordered L10 bulk phase.
Disciplines
Physical Sciences and Mathematics | Physics
Publication Date
8-30-2007
Language
English
License
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 4.0 International License.
Recommended Citation
Rong, Chuan-Bing; Poudyal, Narayan; Chaubey, Girija Shankar; Nandwana, Vikas; Skomski, R.; Wu, Y.Q.; Kramer, Matthew J.; and Liu, J. Ping, "Structural phase transition and ferromagnetism in monodisperse 3 nm FePt particles" (2007). Physics Faculty Publications. 13.
https://mavmatrix.uta.edu/physics_facpubs/13