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Title: Interaction Effects Witin Langmuir Layers and Three-Dimensional Arrays of E-Co Nanoparticles

Abstract

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.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
914397
Report Number(s):
BNL-78965-2007-JA
Journal ID: ISSN 0021-8979; JAPIAU; TRN: US200809%%55
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Appl. Phys.; Journal Volume: 99
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; COBALT; COORDINATION NUMBER; INTERACTIONS; NANOSTRUCTURES; COLLOIDS; PRECIPITATION; MAGNETIC PROPERTIES; national synchrotron light source

Citation Formats

Sachan,M., Walrath, N., Majetich, S., Krycka, K., and Kao, C. Interaction Effects Witin Langmuir Layers and Three-Dimensional Arrays of E-Co Nanoparticles. United States: N. p., 2006. Web. doi:10.1063/1.2168438.
Sachan,M., Walrath, N., Majetich, S., Krycka, K., & Kao, C. Interaction Effects Witin Langmuir Layers and Three-Dimensional Arrays of E-Co Nanoparticles. United States. doi:10.1063/1.2168438.
Sachan,M., Walrath, N., Majetich, S., Krycka, K., and Kao, C. Sun . "Interaction Effects Witin Langmuir Layers and Three-Dimensional Arrays of E-Co Nanoparticles". United States. doi:10.1063/1.2168438.
@article{osti_914397,
title = {Interaction Effects Witin Langmuir Layers and Three-Dimensional Arrays of E-Co Nanoparticles},
author = {Sachan,M. and Walrath, N. and Majetich, S. and Krycka, K. and Kao, C.},
abstractNote = {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.},
doi = {10.1063/1.2168438},
journal = {J. Appl. Phys.},
number = ,
volume = 99,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}