Skip to main content

NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Correlated Spin Canting in Ordered Core-Shell Fe3O4/MnxFe3-xOd4^ Nanoparticle Assemblies

Published

Author(s)

Y. Ijiri, Kathryn L. Krycka, I. Hunt-Isaak, H. Pan, J. Hsieh, Julie Borchers, James Jennings Rhyne, Samuel D. Oberdick, A. Abdelgawad, S. A. Majetich

Abstract

Polarization-analyzed small-angle neutron scattering methods are used to determine the spin arrangements in ordered three-dimensional assemblies of 7.4 nm diameter core-shell Fe3O4/MnxFe3-xO4 nanoparticles. In moderate to high magnetic fields, the assemblies display a canted magnetic structure where the canting direction is coherent from nanoparticle to nanoparticle, in contrast to the less extended, more single particle-like behavior for similar ferrite assemblies. The observed magnetic scattering is modeled by assuming that the interparticle dipolar coupling combined with Zeeman energy effects in a field leads to nanoparticle domains with preferred net spin alignments relative to pre-existing packing symmetry axes. The model qualitatively explains the observed scattering anomalies which change significantly over a range of fields and temperatures, highlighting the possibly complex structures adopted in real, dense nanoparticle systems.
Citation
Physical Review B
Volume
99
Issue
9

Keywords

Small Angle Neutron Scattering, Polarization analysis, Magnetic Nanoparticles, Dipole Interactions, Long-Range Magnetic Correlations

Citation

Ijiri, Y. , Krycka, K. , Hunt-Isaak, I. , Pan, H. , Hsieh, J. , Borchers, J. , Rhyne, J. , Oberdick, S. , Abdelgawad, A. and Majetich, S. (2019), Correlated Spin Canting in Ordered Core-Shell Fe<sub>3</sub>O<sub>4</sub>/Mn<sub>x</sub>Fe<sub>3-x</sub>Od4^ Nanoparticle Assemblies, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=926983 (Accessed October 10, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created March 17, 2019, Updated October 12, 2021
Was this page helpful?