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6 results on '"Soto, T. E."'

4. Particularities of the Formation and Modification of Si and Mg2si as Second Phases in Casting Al Alloys: Use of Shape Descriptors and Fractal Dimension.

Author

Soto, T. E., González, F., Aguilar, C., Béjar, L., Figueroa, I. A., Vargas, J., Abatal, M., and Alfonso, I.

Abstract

This work presents an overview on the study of Si and Mg2Si, obtained as second phases in aluminum alloys, including their modifications due to processing conditions, alloying elements and heat treatments. These micrometric phases are generally studied using optical microscopy (OM), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Although they can be differentiated combining OM and SEM, a validation study using XRD is indispensable. This work studies the peculiarities of using these techniques, and the differentiation of Si and Mg2Si depending on their XRD peaks, morphologies and gray scales. This review showed that the presence of other second phases complicates the identification of Si and Mg2Si. It also revealed that their morphological modifications have been barely studied quantitatively. We are presenting some study cases related to this topic, adding our own quantitative characterizations through the use of shape descriptors and fractal dimension, demonstrating their effectiveness and importance. [ABSTRACT FROM AUTHOR]

Published
2022
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5. Ferromagnetic resonance study of the non-stoichiometric double perovskite Sr2Fe1+<italic>x</italic>Mo1−<italic>x</italic>O6.

Author

Medina, J. De La Torre, Piraux, L., Soto, T. E., Morales, R., Navarro, O., Hernández-Calderón, and Henini

Subjects
FERROMAGNETIC resonance, PEROVSKITE, STRONTIUM oxide, MAGNETIC properties of solids, SOLID state chemistry, MAGNETIZATION
Abstract

In this work we report a ferromagnetic resonance study on the magnetic properties of double perovskite compounds fab-ricated by solid state reaction. Based on a mean field approach, along with morphological considerations, we accurately determined the saturation magnetization of the non-stoichiometric double perovskite Sr2Fe1+xMo1−xO6. Our approach has revealed a direct in-fluence of composition on the overall magnetic behavior of these materials, providing complementary experimental evidence that corroborates previous theoretical findings. The understanding of the influence of composition is of paramount importance for the design of ferromagnetic oxides with tunable magnetic and magneto-transport behavior. [ABSTRACT FROM AUTHOR]

Published
2018
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6. Ferromagnetic resonance study of the non-stoichiometric double perovskite Sr2Fe1+<italic>x</italic>Mo1−<italic>x</italic>O6.

Author

Medina, J. De La Torre, Piraux, L., Soto, T. E., Morales, R., Navarro, O., Hernández-Calderón, and Henini

Subjects
*FERROMAGNETIC resonance, *PEROVSKITE, *STRONTIUM oxide, *SOLID state chemistry, *MAGNETIZATION, MAGNETIC properties of solids
Abstract

In this work we report a ferromagnetic resonance study on the magnetic properties of double perovskite compounds fab-ricated by solid state reaction. Based on a mean field approach, along with morphological considerations, we accurately determined the saturation magnetization of the non-stoichiometric double perovskite Sr2Fe1+xMo1−xO6. Our approach has revealed a direct in-fluence of composition on the overall magnetic behavior of these materials, providing complementary experimental evidence that corroborates previous theoretical findings. The understanding of the influence of composition is of paramount importance for the design of ferromagnetic oxides with tunable magnetic and magneto-transport behavior. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

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