Interaction Effects Witin Langmuir Layers and Three-Dimensional Arrays of E-Co Nanoparticles
Magnetostatic interactions are studied in two types of nanoparticle assemblies. Highly ordered monolayers of {epsilon}-Co nanoparticles are prepared from Langmuir films and self-assembled three-dimensional (3D) arrays formed by slow precipitation of colloidal dispersions of same nanoparticles. The structure of assemblies is found from electron microscopy and small-angle x-ray scattering. The differences in magnetic behavior are interpreted in terms of the particle moment, interparticle separation, and coordination number. Preferential in-plane magnetization is observed due to interactions within a monolayer. 3D arrays show stronger interactions compared to monolayers due to an increased number of nearest neighbors.
- Research Organization:
- Brookhaven National Laboratory (BNL) National Synchrotron Light Source
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 914397
- Report Number(s):
- BNL--78965-2007-JA
- Journal Information:
- J. Appl. Phys., Journal Name: J. Appl. Phys. Vol. 99; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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