Perpendicular Shape Anisotropy Research Articles

Magnetic processes in amorphous YCo2 nanoparticles obtained by heavy ion irradiation

Elongated ferromagnetic amorphous nanoparticles, with an average diameter of 25 Å, have been created by heavy ion irradiation of paramagnetic crystalline YCo2 thin films. As expected in such elongated particles, a perpendicular shape anisotropy is observed. The anisotropy field decreases as the fluences increases, as a result of the onset of dipolar interactions between the nanoparticles.