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Neutron spectroscopic study of crystal-field excitations and the effect of the crystal field on dipolar magnetism in LiRF4 (R = Gd, Ho, Er, Tm, and Yb)
- P. Babkevich, A. Finco, H. Rønnow
- Physics
- 23 October 2015
We present a systematic study of the crystal-field interactions in the LiRF4 (R = Gd, Ho, Er, Tm, and Yb) family of rare-earth magnets. Using detailed inelastic neutron scattering measurements, we…
Spin-torque switching and control using chirped AC currents
- G. Klughertz, L. Friedland, P. Hervieux, G. Manfredi
- Physics
- 6 October 2016
We propose to use oscillating spin currents with slowly varying frequency (chirp) to manipulate and control the magnetization dynamics in a nanomagnet. By recasting the Landau–Lifshitz–Slonczewski…
Autoresonant control of the magnetization switching in single-domain nanoparticles
- G. Klughertz, P. Hervieux, G. Manfredi
- Physics
- 30 August 2014
The ability to control the magnetization switching in nanoscale devices is a crucial step for the development of fast and reliable techniques to store and process information. Here we show that the…
Autoresonant switching of the magnetization in single-domain nanoparticles: Two-level theory
- G. Klughertz, L. Friedland, P. Hervieux, G. Manfredi
- Physics
- 30 March 2015
The magnetic moment of a single-domain nanoparticle can be effectively switched on an ultrashort time scale by means of oscillating (microwave) magnetic fields. This switching technique can be…
Effect of Disorder and Dipolar Interactions in Two-Dimensional Assemblies of Iron-Oxide Magnetic Nanoparticles
- G. Klughertz, G. Manfredi, P. Hervieux, B. Pichon, S. Bégin-Colin
- Physics
- 23 March 2016
We examine the magnetic properties of two-dimensional monolayers of iron-oxide magnetic nanoparticles arranged on a hexagonal lattice and interacting through magnetic dipole forces. Monte Carlo…
Simulated annealing study of the disordered quantum magnet LiHoxEryY1-x-yF4
- G. Klughertz
- Physics
- 2012
Thermal and quantum phase transitions of some rare earth compounds (LiErF4, LiYbF4, LiGdF4 and LiTmF4) are established using the mean field theory. These preliminary calculations allowed evidencing…
O ct 2 01 5 Neutron spectroscopic study of crystal-field excitations and the effect of the crystal field on dipolar magnetism in
- P. Babkevich, A. Finco, H. Rønnow
- 2018
P. Babkevich, ∗ A. Finco, 2 M. Jeong, B. Dalla Piazza, I. Kovacevic, G. Klughertz, 3 K. W. Krämer, C. Kraemer, D. T. Adroja, E. Goremychkin, T. Unruh, 7 T. Strässle, A. Di Lieto, 10 J. Jensen, and H.…
Magnetization Reversal in a Cobalt Nanoparticle
- G. Klughertz, P. Hervieux, G. Manfredi
- Physics
- 2015
We study the magnetization reversal of isolated and interacting single-domain cobalt nanoparticles with uniaxial anisotropy under the macrospin approximation. We analyze the consequences of dipolar…