ROOM-TEMPERATURE DIPOLE FERROMAGNETISM IN LINEAR-SELF-ASSEMBLING MESOSCOPIC FE PARTICLE ARRAYS

Quasi-one-dimensional, nanometer-diameter Fe particle arrays have been prepared by self-organized shadow growth on regularly faceted NaCl (1 10) surfaces. A room-temperature dipole-ferromagnetic phase was observ ed for Linear arrays of Fe particles with radii larger than 2.5 nm. Su rface magneto-optic Kerr magnetization curves indicate easy-axis align ment along the rows of particles. Remanence and coercivity were strong functions of particle diameter and linear island density. Experimenta l results are compared with Monte Carlo micromagnetics calculations, w hich, with no free parameters, reproduce the experimental observations .