Abstract
A combined experimental and computational study was carried out to investigate magnetic properties of NiO nanostructures. Remarkable size-dependent magnetism was discovered. Uniform amorphous NiO showed a dominated antiferromagnetic interaction and an ordering temperature of . NiO clusters (up to ) tend to be ferromagnetic interaction with an ordering temperature of , accompanied by high magnetization and a spin-glass behavior. NiO nanocrystals were found to be antiferromagnetic with uncompensated surface magnetization and shifted hysteresis due to the core-shell interactions.
- Received 26 July 2007
DOI:https://doi.org/10.1103/PhysRevB.76.224402
©2007 American Physical Society