Crystallographically amorphous ferrimagnetic alloys: Comparing a localized atomistic spin model with experiments

Crystallographically amorphous ferrimagnetic alloys: Comparing a localized atomistic spin model with experiments

Femtosecond laser excitation of spin resonances in amorphous ferrimagnetic Gd(1-x)Co(x) alloys.

Using 100 fs laser pulses, a high-frequency exchange and a low-frequency ferromagnetic resonance mode have been excited and detected in an amorphous Gd(1-x)Co(x) (78≤x≤85) ferrimagnetic thin film, on both sides of its angular momentum compensation composition. The excitation efficiency of these modes strongly depends on the amount of laser-induced heating. Ways of selectively and efficiently ex...

Spin-Orbit Torque Efficiency in Compensated Ferrimagnetic Cobalt-Terbium Alloys

SPIN-GLASSES IN AMORPHOUS (Ni100-x Fex) 79P1 3B8 ALLOYS

Dilute amorphous (Niioo-xe )79138 alloys exhibit usual characteristics of spin glasses : freezing temperatures T (sharp cusp in zero-field susceptibility) proportional to x up to x=4 at. %. However, the magnetization does not follow the Blandin-Souletie-Tournier scaling laws. Such an anomaly can be explained within a model of ferromagnetic clusters coupled bt RKKY interaction. INTRODUCTION.From...

Atomistic spin model simulations of magnetic nanomaterials.

Atomistic modelling of magnetic materials provides unprecedented detail about the underlying physical processes that govern their macroscopic properties, and allows the simulation of complex effects such as surface anisotropy, ultrafast laser-induced spin dynamics, exchange bias, and microstructural effects. Here we present the key methods used in atomistic spin models which are then applied to...