5 papers · 1 filter
AC Field-driven orientational crossover and energy dissipation in suspended magnetic nanoparticles
Iago López-Vázquez, Siraj Ul Haq, Kazuya Okada +4
By combining the Landau--Lifshitz--Gilbert equation with Brownian rotational dynamics of magnetic nanoparticles (MNPs), we theoretically investigate the role of particle rotation t…
Simulations of Magnetization Reversal in FM/AFM Bilayers With THz Frequency Pulses
Joel Hirst, Sergiu Ruta, Jerome Jackson +1
It is widely known that antiferromagnets (AFMs) display a high frequency response in the terahertz (THz) range, which opens up the possibility for ultrafast control of their magnet…
Influence of the Finite-size Effects on the Curie Temperature of L10-FePt
Binh Thanh Nguyen, Sergiu Ruta, Ondrej Hovorka +2
We employ an atomistic model using a nearest-neighbor Heisenberg Hamiltonian exchange to study computationally the dependence of the Curie temperature of L10-FePt on finite-size an…
First order reversal curves and intrinsic parameter determination for magnetic materials; limitations of hysteron-based approaches in correlated systems
Sergiu Ruta, Ondrej Hovorka, Pin-Wei Huang +3
The generic problem of extracting information on intrinsic particle properties from the whole class of interacting magnetic fine particle systems is a long standing and difficult i…
Unified model of hyperthermia via hysteresis heating in systems of interacting magnetic nanoparticles
S. Ruta, O. Hovorka, R. Chantrell
We present a general study of frequency and magnetic field dependence of the specific heat power produced during field-driven hysteresis cycles in magnetic nanoparticles with relev…