Synthesis, phase composition, Mossbauer and magnetic characterization of iron oxide nanoparticles

The present work describes the synthesis of iron oxide nanoparticles by thermal decomposition of Fe-precursors in argon and vacuum environments with control over particle size distribution, phase composition and the resulting magnetic properties. The Rietveld analysis of X-ray diffraction data revea...

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Autores principales: Sarveena, Vargas, Jose Marcelo, Shukla, D. K., Meneses, Cristiano T., Mendoza Zélis, Pedro, Singh, M., Sharma, Surender
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2016
Materias:
Física
Iron oxide
Manomagnetism
Core-shell
Magnetic relaxation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/98208
https://ri.conicet.gov.ar/11336/60487
http://pubs.rsc.org/en/Content/ArticleLanding/2016/CP/C5CP07698F#!divAbstract
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-98208
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Iron oxide
Manomagnetism
Core-shell
Magnetic relaxation
spellingShingle Física
Iron oxide
Manomagnetism
Core-shell
Magnetic relaxation
Sarveena
Vargas, Jose Marcelo
Shukla, D. K.
Meneses, Cristiano T.
Mendoza Zélis, Pedro
Singh, M.
Sharma, Surender
Synthesis, phase composition, Mossbauer and magnetic characterization of iron oxide nanoparticles
topic_facet Física
Iron oxide
Manomagnetism
Core-shell
Magnetic relaxation
description The present work describes the synthesis of iron oxide nanoparticles by thermal decomposition of Fe-precursors in argon and vacuum environments with control over particle size distribution, phase composition and the resulting magnetic properties. The Rietveld analysis of X-ray diffraction data revealed the crystallinity as well the single-phase of g-Fe2O3 nanoparticles prepared under vacuum, whereas the argon environment leads to the formation of multi-phase composition of g-Fe2O3/Fe3O4 (90%) and wustite (10%). Synchrotron X-ray absorption near edge structure (XANES) indicates that the predominant phase in both the samples is g-Fe2O3, which is subsequently verified from the Mo¨ssbauerspectra. DC magnetic measurements indicate behavior typical of a superparamagnetic system validated by Mo¨ssbauer analysis. However, further investigation of ac susceptibility by typical Ne´el?Arrhenius andVogel Fulcher magnetic models suggests an influence of interparticle interactions on the overall magnetic behavior of the system.
format Articulo
Preprint
author Sarveena
Vargas, Jose Marcelo
Shukla, D. K.
Meneses, Cristiano T.
Mendoza Zélis, Pedro
Singh, M.
Sharma, Surender
author_facet Sarveena
Vargas, Jose Marcelo
Shukla, D. K.
Meneses, Cristiano T.
Mendoza Zélis, Pedro
Singh, M.
Sharma, Surender
author_sort Sarveena
title Synthesis, phase composition, Mossbauer and magnetic characterization of iron oxide nanoparticles
title_short Synthesis, phase composition, Mossbauer and magnetic characterization of iron oxide nanoparticles
title_full Synthesis, phase composition, Mossbauer and magnetic characterization of iron oxide nanoparticles
title_fullStr Synthesis, phase composition, Mossbauer and magnetic characterization of iron oxide nanoparticles
title_full_unstemmed Synthesis, phase composition, Mossbauer and magnetic characterization of iron oxide nanoparticles
title_sort synthesis, phase composition, mossbauer and magnetic characterization of iron oxide nanoparticles
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/98208
https://ri.conicet.gov.ar/11336/60487
http://pubs.rsc.org/en/Content/ArticleLanding/2016/CP/C5CP07698F#!divAbstract
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