In-situ high-pressure x-ray diffraction study of zinc ferrite nanoparticles
Document Type
Article
Publication Date
1-1-2016
Publication Title
Solid State Sciences
Volume
56
First page number:
68
Last page number:
72
Abstract
We have studied the high-pressure structural behavior of zinc ferrite (ZnFe2O4) nanoparticles by powder X-ray diffraction measurements up to 47 GPa. We found that the cubic spinel structure of ZnFe2O4 remains up to 33 GPa and a phase transition is induced beyond this pressure. The high-pressure phase is indexed to an orthorhombic CaMn2O4-type structure. Upon decompression the low- and high-pressure phases coexist. The compressibility of both structures was also investigated. We have observed that the lattice parameters of the high-pressure phase behave anisotropically upon compression. Further, we predict possible phase transition around 55 GPa. For comparison, we also studied the compression behavior of magnetite (Fe3O4) nanoparticles by X-ray diffraction up to 23 GPa. Spinel-type ZnFe2O4 and Fe3O4 nanoparticles have a bulk modulus of 172 (20) GPa and 152 (9) GPa, respectively. This indicates that in both cases the nanoparticles do not undergo a Hall-Petch strengthening. © 2016 Elsevier Masson SAS. All rights reserved.
Keywords
Crystal structure; Nanostructure; Oxides; Phase transitions; X-ray diffraction
Language
English
Repository Citation
Ferrari, S.,
Kumar, R.,
Grinblat, F.,
Aphesteguy, J. C.,
Saccone, F. D.,
Errandonea, D.
(2016).
In-situ high-pressure x-ray diffraction study of zinc ferrite nanoparticles.
Solid State Sciences, 56
68-72.
http://dx.doi.org/10.1016/j.solidstatesciences.2016.04.006