Spin disorder in maghemite nanoparticles investigated using polarized neutrons and nuclear resonant scattering
Abstract
The manuscript reports the investigation of spin disorder in maghemite nanoparticles of different shape by a combination of polarized small-angle neutron scattering (SANSPOL) and nuclear forward scattering (NFS) techniques. Both methods are sensitive to magnetization on the nanoscale. SANSPOL allows for investigation of the particle morphology and spatial magnetization distribution and NFS extends this nanoscale information to the atomic scale, namely the orientation of the hyperfine field experienced by the iron nuclei. The studied nanospheres and nanocubes with diameters of 7.4nm and 10.6 nm, respectively, exhibit a significant spin disorder. This effect leads to a reduction of the magnetization to 44% and 58% of the theoretical maghemite bulk value, observed consistently by both techniques.
- Authors:
-
- Deutsches Elektronen-Synchrotron (DESY), Germany
- Univ. of Cologne (Germany)
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- Uppsala Univ. (Sweden)
- Stockholm Univ. (Sweden)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1261381
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physics. Conference Series
- Additional Journal Information:
- Journal Volume: 711; Journal ID: ISSN 1742-6588
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Herlitschke, Marcus, Disch, Sabrina, Sergueev, I., Schlage, Kai, Wetterskog, Erik, Bergstrom, Lennart, and Hermann, Raphael P. Spin disorder in maghemite nanoparticles investigated using polarized neutrons and nuclear resonant scattering. United States: N. p., 2016.
Web. doi:10.1088/1742-6596/711/1/012002.
Herlitschke, Marcus, Disch, Sabrina, Sergueev, I., Schlage, Kai, Wetterskog, Erik, Bergstrom, Lennart, & Hermann, Raphael P. Spin disorder in maghemite nanoparticles investigated using polarized neutrons and nuclear resonant scattering. United States. https://doi.org/10.1088/1742-6596/711/1/012002
Herlitschke, Marcus, Disch, Sabrina, Sergueev, I., Schlage, Kai, Wetterskog, Erik, Bergstrom, Lennart, and Hermann, Raphael P. Wed .
"Spin disorder in maghemite nanoparticles investigated using polarized neutrons and nuclear resonant scattering". United States. https://doi.org/10.1088/1742-6596/711/1/012002. https://www.osti.gov/servlets/purl/1261381.
@article{osti_1261381,
title = {Spin disorder in maghemite nanoparticles investigated using polarized neutrons and nuclear resonant scattering},
author = {Herlitschke, Marcus and Disch, Sabrina and Sergueev, I. and Schlage, Kai and Wetterskog, Erik and Bergstrom, Lennart and Hermann, Raphael P.},
abstractNote = {The manuscript reports the investigation of spin disorder in maghemite nanoparticles of different shape by a combination of polarized small-angle neutron scattering (SANSPOL) and nuclear forward scattering (NFS) techniques. Both methods are sensitive to magnetization on the nanoscale. SANSPOL allows for investigation of the particle morphology and spatial magnetization distribution and NFS extends this nanoscale information to the atomic scale, namely the orientation of the hyperfine field experienced by the iron nuclei. The studied nanospheres and nanocubes with diameters of 7.4nm and 10.6 nm, respectively, exhibit a significant spin disorder. This effect leads to a reduction of the magnetization to 44% and 58% of the theoretical maghemite bulk value, observed consistently by both techniques.},
doi = {10.1088/1742-6596/711/1/012002},
journal = {Journal of Physics. Conference Series},
number = ,
volume = 711,
place = {United States},
year = {Wed May 11 00:00:00 EDT 2016},
month = {Wed May 11 00:00:00 EDT 2016}
}
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Magnetic anisotropy of individual maghemite mesocrystals
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