Microwave Assisted Switching of Magnetisation of a Single Nanoparticle
type: Dataset
description: A low temperature microSQUID magnetometer coupled to a microwave antenna was used to probe the assisted switching of the magnetization of a ferromagnetic nanoparticle. Using an original measurement protocol based on the control of the microwave amplitude and phase, we studied the basins of attraction of the precessional modes of the magnetization dynamics. The switching of the magnetization can thus be controlled by choosing an amplitude and phase in one particular basin. In particular, we evidenced the counter intuitive fact that the magnetization switching can be prevented by choosing a “wrong” phase, even though the amplitude is high enough to switch the system with another phase. Moreover, we used the basin's sensitivity to the parameters governing the magnetization dynamics to determine a value for the Gilbert's damping constant α. This is the first measurement of the damping constant on an individual nanoparticle.
landing page: https://theses.hal.science/tel-00767410
identifier: NNT: 2012GRENY022
keyword: aimantation
keyword: dynamics
keyword: dynamique
keyword: infoeu-reposemanticsdoctoralthesis
keyword: magnetism
keyword: magnetisme
keyword: magnetization
keyword: micro-onde
keyword: microwave
keyword: nanoparticle
keyword: nanoparticule
keyword: physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother
keyword: retournement
keyword: switching
keyword: theses
issued: 2026-05-30T02:00:33.541864
modified: 2026-05-30T02:00:33.541872
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Microwave Assisted Switching of Magnetisation of a Single Nanoparticle
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00767410
issued: 2026-05-30T02:00:33.573737
modified: 2026-05-30T02:00:33.461836