| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1802749 | Journal of Magnetism and Magnetic Materials | 2009 | 5 Pages |
Abstract
Oxide free core-shell Fe80Rh20 nanoparticles with an average diameter of about 2Â nm were wet-chemically synthesised with two different morphologies: either with Rh-rich or an Fe-rich core. The magnetic properties of these nanoparticles were investigated between 5 and 290Â K by ferromagnetic resonance and superconducting quantum interference device magnetometry. The magnetic anisotropy field varied by a factor of 2 in this temperature range. The nanoparticles with Rh-rich core were found to have a higher anisotropy field of BA=0.214T at 5Â K as compared to the nanoparticles with Fe-rich core (BA=0.169T). Multifrequency ferromagnetic resonance (4-24Â GHz) was used to determine the g-factor. It was determined that the g-factor of nanoparticles with Fe-rich core is higher (g=2.08) compared to nanoparticles with Rh-rich core g=2.06, being close to the value for iron bulk.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
A.V. Trunova, J. Lindner, R. Meckenstock, M. Spasova, M. Farle, D. Ciuculescu, C. Amiens, B. Chaudret, M. Respaud,