Cohesive, structural, and electronic properties of Fe-Si compounds

Moroni, E. G.; Wolf, W.; Häfner, J.; Podloucky, R.

doi:10.1103/physrevb.59.12860

Cited by 224 publications

(178 citation statements)

References 63 publications

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“…In fact, the intermetallic compound FeSi appears in the phase diagram. The structure of FeSi structure is not bcc but B20 [42][43][44] as explained in the previous section. Some authors reject the existence of B2 ordering at low Si-contents [45] , considering it as an incomplete D0 3 ordering.…”

Section: Figura 2 Diagrama De Fases Del Sistema Fe-si Según Kubaschementioning

confidence: 98%

A review of ordering phenomena in iron-silicon alloys

Villafañe¹,

Houbaert²

2013

REVMETAL

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Silicon steel is an industrially-desired alloy of iron and silicon, characterised by soft magnetic properties, low eddy-current losses, and low magnetostriction. Silicon steels have narrow hysteresis cycles, making them particularly advantageous in applications using electromagnetic fields, such as transformers, generators, electric motor cores, and few other components in industry. Despite its incontestable industrial value, there is not much agreement on the atomic structure of silicon steel. Gaining better understanding of e.g. ordering processes in Fe-Si alloys could not only explain their magnetic properties, but also open opportunities to reduce their weaker characteristics, such as brittleness that adversely affects silicon steel workability and its associated high production costs. This review summarises the state-of-the-art knowledge about ordering in silicon steel and describes the most relevant experimental techniques used for studying its microstructure. In addition, the process of building the iron rich part of the Fe-Si phase diagram is explained. Lastly, the influence of order on the alloy's magnetic and mechanical properties is illustrated. KeywordsOrdering; Iron-silicon alloys; Intermetallic phases; Mechanical properties; Phase diagram. Revisión de fenómenos de orden en aleaciones hierro-silicio ResumenEl acero al silicio es una aleación de importancia industrial, caracterizada por propiedades magnéticas blandas, bajas pérdidas por corrientes de Foucault y baja magnetostricción. Los aceros al silicio tienen ciclo de histéresis estrecho, lo que es una ventaja en aplicaciones con campos electromagnéticos, como transformadores, generadores, núcleos de motores eléctricos y otros componentes industriales. A pesar de su incomparable valor industrial, no hay convenio sobre la estructura atómica del acero al silicio. Obtener mayor conocimiento sobre los procesos de orden no sólo podría explicar las propiedades magnéticas sino que también podría abrir vías para la reducción de sus características más débiles, como su fragilidad, la cual afecta negativamente a la fabricación del acero al silicio y se asocia con altos costes de producción. Esta revisión resume los últimos conocimientos sobre orden en acero al silicio y describe las técnicas experimentales más importantes usadas para estudiar su estructura. Además, se da una explicación sobre la construcción de la parte rica en hierro del diagrama de fases del Fe-Si. Por último se ilustra la influencia del orden en las propiedades magnéticas y mecánicas. Palabras claveOrden; Aleaciones hierro-silicio; Fases intermetálicas; Propiedades mecánicas; Diagrama de fases.

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Section: Figura 2 Diagrama De Fases Del Sistema Fe-si Según Kubaschementioning

confidence: 98%

A review of ordering phenomena in iron-silicon alloys

Villafañe¹,

Houbaert²

2013

REVMETAL

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“…All calculations were spin polarised with a PBE functional (Perdew et al 1996); 14 electrons were treated as valence for Fe, 4 for Si and 10 for Ni. However, in all cases the magnetic moments went to zero, as has previously been found for FeSi (Moroni et al 1999). Convergence tests were carried out for all calculations, to ensure an error of less than 0.001 eV per atom.…”

Section: Calculation Methodsmentioning

confidence: 99%

High-temperature ab initio calculations on FeSi and NiSi at conditions relevant to small planetary cores

2017

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“…In addition, increasing the interface resistance by a MgO tunnel barrier helps to reduce the large impedance mismatch 9 that prevents efficient spin injection across the interface. A lot of effort has been made over the last decades to characterize Fe 3 Si compounds in terms of phase stability, structure, electronic and magnetic properties 10,11 . However, its static and dynamic magnetization behavior is strongly dominated by Fe due to its large magnetic moment with respect to Si and three times larger amount.…”

Section: Introductionmentioning

confidence: 99%

Induced magnetism on silicon in Fe3Si quasi-Heusler compound

et al. 2012

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Element-specific magnetic moments of epitaxially grown Fe3Si in D03 crystal symmetry were analyzed by means of x-ray absorption spectroscopy and its associated magnetic circular dichroism. To detect the weak magnetization induced at the Si sites, measurements were performed at both Si K edge and Si L3,2 edges. By band structure calculations based on either the SPR-KKR method or FLAPW with GGA, the spectroscopic features could be reproduced and provide an insight to the underlying physics. In addition, comparison of the experimental data to calculated spectra gave us the possibility to estimate the induced effective spin and orbital magnetic moment of Si in our sample, i.e. µ eff s = (−0.011 ± 0.005) µB and µ l = (−0.003 ± 0.003) µB, respectively. The sign and the order of magnitude of the tiny orbital magnetic moment has been confirmed by application of the magneto-optical sum rule.

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Cohesive, structural, and electronic properties of Fe-Si compounds

Cited by 224 publications

References 63 publications

A review of ordering phenomena in iron-silicon alloys

A review of ordering phenomena in iron-silicon alloys

High-temperature ab initio calculations on FeSi and NiSi at conditions relevant to small planetary cores

Induced magnetism on silicon in Fe3Si quasi-Heusler compound

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