Enhanced Curie temperatures in Fe and Co magnetic nanoparticle assembly on single-crystalline Al2O3/NiAl(100) with normal metal capping layer
Journal
Applied Physics Letters
Journal Volume
88
Date Issued
2006
Author(s)
Abstract
The ferromagnetism of Fe nanoparticle assembly on Al2O3∕NiAl(100) is observed above 150K with the coverage larger than 5 ML (monolayer). Cu capping layer induces an enhancement of the Curie temperature (TC) in both Fe and Co magnetic nanoparticle assembly. The TC of Fe nanoparticle assembly with 2 and 6 ML Cu capping layer is enhanced by ∼20K and even higher, indicating the critical effects of metallic capping layer in such magnetic nanostructures as nanoparticle assembly. The capping layer effect would be crucial for the ex situ measurements and the nanostorage-related applications.
Type
journal article