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Spin Canting Across Core/Shell Fe3O4/MnxFe3-xO4 Nanoparticles

Published

Author(s)

Samuel D. Oberdick, Ahmed Abdelgawad, Carlos Moya, Samaneh Mesbahi-Vasey, Demie Kepaptsoglou, Vlado K. Lazarov, Richard F. L. Evans, Daniel Meilak, Elizabeth Skoropata, Johan van Lierop, Ian Hunt-Isaak, Hillary Pan, Yumi Ijiri, Kathryn L. Krycka, Julie Borchers, Sara A. Majetich

Abstract

Core/shell Fe3dO4/MnxFe3-xO4 nanoparticles were synthesized in a single reaction using molecular precursors with different thermal stability. Scanning transmission electron microscopy combined with electron energy loss spectroscopy confirms the core/shell structure. Atomic absorption, Mossbauer spectroscopy, x-ray absorption spectroscopy, and x-ray magnetic circular dichroism are used to determine the precise stoichiometry of the shell. Vibrating sample magnetometry reveals the magnetization as a function of field and temperature, while small angle neutron scattering shows evidence of both parallel and perpendicular magnetic correlations, suggesting multi-particle coherent spin canting involving both the surface and interior of the nanoparticles. Atomistic simulations help to understand the underlying mechanism of spin canting.
Citation
Scientific Reports
Volume
8

Keywords

SANS, Magnetic nanoparticles, Core/shell, Spin canting

Citation

Oberdick, S. , Abdelgawad, A. , Moya, C. , Mesbahi-Vasey, S. , Kepaptsoglou, D. , Lazarov, V. , Evans, R. , Meilak, D. , Skoropata, E. , van Lierop, J. , Hunt-Isaak, I. , Pan, H. , Ijiri, Y. , Krycka, K. , Borchers, J. and Majetich, S. (2018), Spin Canting Across Core/Shell Fe<sub>3</sub>O<sub>4</sub>/Mn<sub>x</sub>Fe<sub>3-x</sub>O<sub>4</sub> Nanoparticles, Scientific Reports, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=924272 (Accessed July 16, 2024)

Issues

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Created February 20, 2018, Updated October 12, 2021