Interrelation between structural ordering and magnetic properties in bcc Fe-Si alloys

Куликов, Н. И.; Fristot, Danièle; Hugel, J.; Postnikov, A. V.

doi:10.1103/physrevb.66.014206

Cited by 42 publications

(46 citation statements)

References 32 publications

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“…%, although a strong D03 ordering decreases magnetostriction [41] . Magnetic moment of iron depends on the position in the lattice: for iron atoms surrounded by iron, the value is close to 2.4 m B while for atoms surrounded by iron and silicon atoms (D0 3 configuration), the value drops to approximately 1.3 m B [99] according to neutron diffraction measurements. These experimental values are in agreement with ab initio simulations [100] Apparently, D0 3 ordering is more stable due to a total reduction of the energy as compared to other type of orderings as B2.…”

Section: Influence Of Ordering On Electric and Magnetic Propertiesmentioning

confidence: 99%

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: Influence Of Ordering On Electric and Magnetic Propertiesmentioning

confidence: 99%

A review of ordering phenomena in iron-silicon alloys

Villafañe¹,

Houbaert²

2013

REVMETAL

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“…Kudrnovsky The ab initio results from [15] will be used for calculations in the present work since they not only present the linear variation of the Fe [A,C] magnetic moments with the number of Si atoms as NN, but also the negative moment of Si [D] atoms and the enhancement of the moment of Fe [B] atoms in the DO3 structure. A more adequate ab initio study was done by Kulikov et al [17] who considered a variation in the lattice parameter, but it could not be applied in this work since only the magnetic moments for the ordered Fe 3 Si were published.…”

Section: Mössbauer Spectrometry Applied To Finemet Alloysmentioning

confidence: 98%

Structural and magnetic study of Mo-doped FINEMET

Silveyra

Cremaschi

Janičkovič

et al. 2011

Journal of Magnetism and Magnetic Materials

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“…Their magnetic properties and peculiarities of chemical ordering are an object of research of many scientific groups. In spite of a long history of study of these alloys (for example, [1][2][3][4]) some questions related with the local properties remain unclear. Suitable experimental methods to study local properties are nuclearresonance methods which combine a wide applicability with a simple usage and high precision of measuring the hyperfine interaction (HFI).…”

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confidence: 98%

Hyperfine magnetic field at Si nuclei in Fe-Si alloys

Аржников

Добышева

2010

Hyperfine Interact

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Calculations of the hyperfine magnetic field at silicon nuclei are conducted for Fe 1−x Si x alloys and the results are compared with experimental data available. The effect of the atomic environment on the formation of the hyperfine fields at iron and silicon nuclei is discussed. Some contradictions in early experimental studies are explained.Keywords Fe and its alloys · LAPW calculation · Nuclear magnetic resonance · Mossbauer spectroscopy Fe-Si alloys and their combinations with other elements are widely used in engineering. Their magnetic properties and peculiarities of chemical ordering are an object of research of many scientific groups. In spite of a long history of study of these alloys (for example, [1-4]) some questions related with the local properties remain unclear. Suitable experimental methods to study local properties are nuclearresonance methods which combine a wide applicability with a simple usage and high precision of measuring the hyperfine interaction (HFI). Nuclear-resonance experiments complement magnetic and structural measurements, as the parameters of HFI are directly connected with the electron and spin densities at resonance nucleus (which can be related to the partial charge and the local magnetic moment of the atom, correspondingly), and the relative intensity of subspectra can be attributed to the number of atoms being in different structural environments. But even using contemporary mathematical methods for the spectra decomposition, such as [5][6][7], one cannot reliably interpret the experimental spectra of systems with large number of nonequivalent atoms without theoretical first-principles calculations. The calculations of electron structure in frames of the density functional theory appear as an additional research method which, by its reliability, approaches importance

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Interrelation between structural ordering and magnetic properties in bcc Fe-Si alloys

Cited by 42 publications

References 32 publications

A review of ordering phenomena in iron-silicon alloys

A review of ordering phenomena in iron-silicon alloys

Structural and magnetic study of Mo-doped FINEMET

Hyperfine magnetic field at Si nuclei in Fe-Si alloys

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