Journal article
Uniform excitations in magnetic nanoparticles
Department of Physics, Technical University of Denmark1
Surface Physics and Catalysis, Department of Physics, Technical University of Denmark2
Magnetic Systems Group, LabChip Section, Department of Micro- and Nanotechnology, Technical University of Denmark3
LabChip Section, Department of Micro- and Nanotechnology, Technical University of Denmark4
Department of Micro- and Nanotechnology, Technical University of Denmark5
We present a short review of the magnetic excitations in nanoparticles below the superparamagnetic blocking temperature. In this temperature regime, the magnetic dynamics in nanoparticles is dominated by uniform excitations, and this leads to a linear temperature dependence of the magnetization and the magnetic hyperfine field, in contrast to the Bloch T3/2 law in bulk materials.
The temperature dependence of the average magnetization is conveniently studied by Mössbauer spectroscopy. The energy of the uniform excitations of magnetic nanoparticles can be studied by inelastic neutron scattering.
| Language: | English |
|---|---|
| Publisher: | Beilstein-Institut |
| Year: | 2010 |
| Pages: | 48-54 |
| ISSN: | 21904286 |
| Types: | Journal article |
| DOI: | 10.3762/bjnano.1.6 |
| ORCIDs: | Frandsen, Cathrine and Hansen, Mikkel Fougt |
