Reduced magnetic coercivity and switching field in conetic-alloy-based synthetic-ferrimagnetic nanodots

Abstract

The coercivity (H_c) and switching field (H_sw) of free layers increase remarkably with shrinking size, which reduces the sensitivity of spintronic devices. Conetic-alloy-based synthetic ferrimagnetic (SyF) trilayers are proposed to show reduced H_c and H_sw than single-layer in nanodots. The investigation on the thickness dependence reveals linear reliance of H_c and H_sw on amplification factor. H_c and H_sw are further reduced after field annealing at 200 °C. This work provides an approach to reduce the H_c and H_sw in nanomagnets.