LIGAND PASSIVATED CORE-SHELL FEPT@CO NANOMAGNETS EXHIBITING ENHANCED ENERGY PRODUCT

摘要

A one-pot microwave synthesis of Fe0.65Pt0.35@Co allows systematic growth of the soft-magnet Co shell (0.6 nm to 2.7 nm thick) around the hard-magnet Fe0.65Pt0.35 core (5 nm in diameter). Controlled growth leads to a four-fold enhancement in energy product of the core-shell assembly as compared to the energy product of bare Fe0.65Pt0.35 cores. The simultaneous enhancement of coercivity and saturation moment reflects the onset of theoretically predicted exchange spring behavior. The demonstration of nanoscale exchange-spring magnets will result in improved high-performance magnet design for energy applications.

主权项

1. An article comprising:
a core region comprising an alloy of iron and platinum; a shell region in contact with the core region, the shell region comprising cobalt.