uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Surface Effects in Ultrathin Iron Oxide Hollow Nanoparticles: Exploring Magnetic Disorder at the Nanoscale
Le Mans Univ, CNRS, UMR 6283, Inst Mol & Mat Mans, F-72085 Le Mans 9, France;Univ Libanaise, Fac Sci, Sect 1, MPLAB, Beirut 1100, Lebanon.
Le Mans Univ, CNRS, UMR 6283, Inst Mol & Mat Mans, F-72085 Le Mans 9, France.
Le Mans Univ, CNRS, UMR 6283, Inst Mol & Mat Mans, F-72085 Le Mans 9, France.
Le Mans Univ, CNRS, UMR 6283, Inst Mol & Mat Mans, F-72085 Le Mans 9, France;Univ Libanaise, Fac Sci, Sect 1, MPLAB, Beirut 1100, Lebanon.
Show others and affiliations
2018 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 122, no 13, p. 7516-7524Article in journal (Refereed) Published
Abstract [en]

A detailed study of the structural and magnetic properties of polycrystalline hollow gamma-Fe2O3 nanoparticles of similar to 9.4 nm size was performed. High-resolution transmission electron microscopy images confirmed the crystalline structure and the presence of a ultrathin shell thickness of similar to 1.4 nm, implying a very high surface/volume ratio. These hollow nanoparticles were investigated using zero-field and in-field Fe-57 Mossbauer spectrometry. The zero-field hyperfine structure suggests some topological disorder, whereas the infield one shows the presence of a comp magnetic structure that can be fairly described as two opposite pseudosperomagnetic sublattices attributed to octahedral and tetrahedral iron sites. Such an unusual feature is consistent with the presence of noncollinear spin structure originated from the increased surface due to the hollow morphology. Such a complex local spin structure evidenced from Mossbauer experiments was correlated with exchange bias coupling showing at low temperature by magnetization measurements. Monte Carlo simulations on a ferrimagnetic hollow nanoparticle unambiguously corroborate the critical role of the surface anisotropy on the noncollinearity of spin structure in our samples.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 122, no 13, p. 7516-7524
National Category
Condensed Matter Physics Physical Chemistry Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-352691DOI: 10.1021/acs.jpcc.8b00300ISI: 000429625600051OAI: oai:DiVA.org:uu-352691DiVA, id: diva2:1215631
Funder
Swedish Research CouncilGöran Gustafsson Foundation for Research in Natural Sciences and Medicine
Available from: 2018-06-08 Created: 2018-06-08 Last updated: 2018-06-14Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records BETA

Mathieu, Roland

Search in DiVA

By author/editor
Mathieu, Roland
By organisation
Solid State Physics
In the same journal
The Journal of Physical Chemistry C
Condensed Matter PhysicsPhysical ChemistryEngineering and Technology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 4 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf