Improvement of magnetic domain wall dynamics by buffer layer annealing of Pt/Co/Pt
Résumé
We investigated in the impact of annealing the Ta/Pt buffer layers on the magnetic properties of Ta/Pt/Co/Pt ultra thinlayers. A controlled annealing up to 500°C leads to the decrease of perpendicular magnetic anisotropy (PMA) and an improvement of the domain wall dynamics. A strong decrease of depinning field is observed in the annealed samples. The decrease of PMA also leads to a considerable increase of the domain wall mobility in the precessional regime. This annealing procedure therefore boosts domain wall velocity, helping to improve future spintronic applications.