<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>A method of synthesis of mesoporous γ-Fe2O3 by thermal decomposition of iron citrate has been proposed. Investigations of the crystalline and magnetic structure of obtained materials were done. Nanodispersed maghemite (γ-Fe2O3) with the sizes of coherent scattering regions of about 4–7 nm consisted of one phase only after gel sintering at 200, 250 and 300 °C. The particles of synthesized materials were both in magnetically ordered, and superparamagnetic states, and they formed a grid-like mesoporous structure. The influence of magnetic dipole interparticle interaction on the parameters of Mossbauer spectra was observed. A phenomenological model of the differences between nanodispersed γ-Fe2O3 magnetic microstructures obtained after annealing at different temperatures was presented.</p></abstract>

A method of synthesis of mesoporous γ-Fe2O3 by thermal decomposition of iron citrate has been proposed. Investigations of the crystalline and magnetic structure of obtained materials were done. Nanodispersed maghemite (γ-Fe2O3) with the sizes of coherent scattering regions of about 4–7 nm consisted of one phase only after gel sintering at 200, 250 and 300 °C. The particles of synthesized materials were both in magnetically ordered, and superparamagnetic states, and they formed a grid-like mesoporous structure. The influence of magnetic dipole interparticle interaction on the parameters of Mossbauer spectra was observed. A phenomenological model of the differences between nanodispersed γ-Fe2O3 magnetic microstructures obtained after annealing at different temperatures was presented.

Synthesis and Mossbauer studies of mesoporous γ-Fe2O3
                  

Vasyl Stefanyk Precarpathian National University, 57 Shevchenko Str., Ivano-Frankivsk, 76025, Ukraine

Institute of Metal Physics, National Academy of Science, 36 Acad. Vernadsky Boulevard., Kyiv, 03680, Ukraine

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Synthesis and Mossbauer studies of mesoporous γ-Fe2O3"}

A method of synthesis of mesoporous γ-Fe2O3 by thermal decomposition of iron citrate has been proposed. Investigations of the crystalline and magnetic...

Synthesis and Mossbauer studies of mesoporous γ-Fe2O3

Publié en ligne: 17 oct. 2014

Pages: 481 - 486

DOI: https://doi.org/10.2478/s13536-014-0202-4

Mots clés
γ-Fe2O3, mesoporous structure, Mossbauer spectroscopy, superparamagnetic properties

© 2014 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Synthesis and Mossbauer studies of mesoporous γ-Fe2O3

Publié en ligne: 17 oct. 2014

Pages: 481 - 486

DOI: https://doi.org/10.2478/s13536-014-0202-4

Mots clésγ-Fe2O3, mesoporous structure, Mossbauer spectroscopy, superparamagnetic properties

© 2014 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
γ-Fe2O3, mesoporous structure, Mossbauer spectroscopy, superparamagnetic properties