Resolving 3D magnetism in nanoparticles using polarization analyzed SANS

Abstract

Utilizing a polarized 3He cell as an analyzer we were able to perform a full polarization analysis on small-angle neutron scattering (SANS) data from an ensemble of 7 nm magnetite nanoparticles. The results led to clear separation of magnetic and nuclear scattering plus a 3D vectorial decomposition of the magnetism observed. At remanence variation in long-range magnetic correlation length was found to be highly dependent on temperature from 50 to 300 K. Additionally, we were able to compare the magnetic scattering from moments along and perpendicular to an applied field at saturation and in remanence.

Publisher

North-Holland

Publication Date

9-1-2009

Publication Title

Physica B: Condensed Matter

Department

Physics and Astronomy

Document Type

Article

DOI

https://dx.doi.org/10.1016/j.physb.2009.06.024

Notes

Proceedings of the 7th International Workshop on Polarized Neutrons for Condensed Matter Investigations and 2nd International Symposium of Quantum Beam Science Directorate.

Language

English

Format

text

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