Anisotropy in Ferromagnetic Nanoparticles: Level-to-Level Fluctuations of a Collective Effect
| dc.creator | Usaj, Gonzalo | |
| dc.creator | Baranger, Harold U. | |
| dc.date | 2004-07-29 | |
| dc.date | 2005-11-30 | |
| dc.date.accessioned | 2026-07-07T06:37:14Z | |
| dc.date.available | 2026-07-07T06:37:14Z | |
| dc.description | We calculate the mesoscopic fluctuations of the magnetic anisotropy of ferromagnetic nanoparticles. A microscopic spin-orbit Hamiltonian considered as a perturbation of the much stronger exchange interaction first yields an explicit expression for the anisotropy tensor. Then, assuming a simple random matrix model for the spin-orbit coupling allows us to describe the fluctuation of such a tensor. In the case of uniaxial anisotropy, we calculate the distribution of the anisotropy constant for a given number of electrons, and its variation upon increasing this number by one. The magnitude of the latter is sufficient to account for the experimental data. | |
| dc.description | 7 pages, 3 figures, published version | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0407771 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0407771 | |
| dc.identifier | Europhys. Lett., 72 (1), pp. 110-116 (2005) | |
| dc.identifier | doi:10.1209/epl/i2005-10210-4 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/100320 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Anisotropy in Ferromagnetic Nanoparticles: Level-to-Level Fluctuations of a Collective Effect | |
| dc.type | text |