Influence of the cooling speed on the soft magnetic and mechanical properties of Fe61Co10Y8W1B20 amorphous alloy

Nabiałek, M.; Pietrusiewicz, P.; Dośpiał, M.; Szota, M.; Gondro, J.; Gruszka, K.; Dobrzańska-Danikiewicz, A.; Walters, Simon; Bukowska, A.

doi:10.1016/j.jallcom.2013.12.236

Cited by 15 publications

(12 citation statements)

References 23 publications

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“…The D sp parameter, which describes the spin-wave stiffness (and, therefore, the ability to transfer the spin torque) is more than twelve times higher (D sp /D Fe = 12.96) than with pure Fe (the largest percentage share in the alloy), which is found to be between D Fe = 2.8 meV nm 2 at 4.2 K 14 and D Fe = 3.14 meV nm 2 at room temperature. 15 This parameter is connected with the atomic packing density (a higher D sp means a higher surface density 16 ) and it may indicate that linear defects should rather be considered as swellings of voids resulting in an increase in the local density around the defects, while keeping the overall material density low.…”

Section: Resultsmentioning

confidence: 99%

Analysis of the structural-defect influence on the magnetization process in and above the Rayleigh region

Gruszka¹

2016

Mater. Tehnol.

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The paper presents studies of the structural-defect influence on the magnetization process in low magnetic fields (H < 0.4 Hc) and above the Rayleigh range. The investigated Fe62Co10Y8B20 alloy samples were obtained with the injection casting method resulting in the amorphous-structure state, which was confirmed with XRD. The studies were conducted by analyzing the disaccommodation of the magnetic-susceptibility process and using Kronmüller's theory in the approach to the ferromagnetic saturation area. On the basis of the obtained results, it was found that the main factor responsible for the processes of magnetization in low magnetic fields are point defects, whereas in the case of high magnetic fields, the magnetization process depends mainly on second-type pseudo-dislocation dipoles. Keywords: metallic glasses, defects, disaccommodation, Kronmüller's theorŷ lanek predstavlja {tudij vpliva strukturnih defektov na proces magnetizacije v {ibkem magnetnem polju (H < 0,4 Hc) in nad Rayleigh podro~jem. Vzorci preiskovane zlitine Fe62Co10Y8B20 so bili izdelani z metodo injekcijskega brizganja, kar je povzro~ilo amorfno strukturo, ki je bila potrjena z rentgensko analizo (XRD). [tudije so bile izvedene z analizo procesa neustreznosti magnetne ob~utljivosti in z uporabo Kronmülerjeve teorije pri pribli`evanju feromagnetno nasi~enemu podro~ju. Na osnovi dobljenih rezultatov je bilo ugotovljeno, da so pri procesu magnetizacije glavni faktor to~kaste napake, medtem ko je v primeru magnetizacije v mo~nem magnetnem polju proces odvisen predvsem od druge vrste psevdodislociranih dipolov.

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Section: Resultsmentioning

confidence: 99%

Analysis of the structural-defect influence on the magnetization process in and above the Rayleigh region

Gruszka¹

2016

Mater. Tehnol.

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“…Those samples were interesting enough to become a research material for materials engineering and physics specialists. FeCoB based amorphous alloys that demonstrate so called soft magnetic properties proved to be of special interest [11][12][13][14]. The amorphous tapes based on FeCoB experience significantly lower losses during magnetization reversal than FeSi transformer steels used in the electro technical industry [15].…”

Section: Introductionmentioning

confidence: 99%

Effect of structural relaxations within the amorphous structure on the magnetic properties of amorphous tapes from FeCoB family

Szota

2017

Archives of Metallurgy and Materials

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The paper presents the research results for the Fe 78 Co 2 Si 9 B 11 amorphous alloy, and after the process of annealing resulting only in the relaxation of the material. The structure relaxations occurring in the volume of test samples lead to the changes in their magnetic and mechanic properties. Therefore the studies on the effect of the structure defects on the properties of these type of materials are important. Understanding the processes occurring during the magnetizing of amorphous alloys can be helpful in the design of modern functional materials for special purposes. The main purpose of this elaboration was to determine the effect of the amorphous structure defects in the state after solidification and after heat treatment on the changes in the magnetizing process and in such parameters as the saturation magnetization and the coercivity field.

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“…The quenching speed of the molten alloy to the solid state determines the structural relaxations occurring in the alloy volume, which, in turn, strongly influences the properties of the resulting amorphous alloys [11,12]. An increase in the value of the viscosity of the alloy during the manufacturing process results in the restriction of the magnitude and rate of atomic diffusion.…”

Section: Introductionmentioning

confidence: 99%

“…An increase in the value of the viscosity of the alloy during the manufacturing process results in the restriction of the magnitude and rate of atomic diffusion. According to the investigations performed in [11][12][13][14], the structure and microstructure of samples produced at different cooling speeds influence directly the magnetic properties, despite the fact that the samples possess an amorphous structure. This conclusion proves that the atomic structure of amorphous materials depends on the cooling speed during the production process.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Quenching Rate on the Structure and Magnetic Properties of the Fe-Based Amorphous Alloy

Nabiałek

2016

Archives of Metallurgy and Materials

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This paper presents the results of investigations into the structure, microstructure and magnetic properties of Fe61Co10Y8W1B20 amorphous alloy. The alloy samples were in two physical forms: (1) plates of approximate thickness 0.5 mm (so-called bulk amorphous alloys) and (2) a ribbon of approximate thickness 35 μm (so-called classic amorphous alloy). The investigations comprised: X-ray diffractometry, Mössbauer spectrometry, transmission electron microscopy, and selected magnetic measurements; all of the investigations were carried out on samples in the as-quenched state. Analysis of the obtained SEM and TEM images, X-ray diffraction patterns, Mössbauer spectrometry results and measurements of the magnetisation in a high magnetic field facilitated collectively the detailed description of the structure of the investigated alloy, which was found to depend on the quenching speed.

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Influence of the cooling speed on the soft magnetic and mechanical properties of Fe61Co10Y8W1B20 amorphous alloy

Cited by 15 publications

References 23 publications

Analysis of the structural-defect influence on the magnetization process in and above the Rayleigh region

Analysis of the structural-defect influence on the magnetization process in and above the Rayleigh region

Effect of structural relaxations within the amorphous structure on the magnetic properties of amorphous tapes from FeCoB family

Influence of the Quenching Rate on the Structure and Magnetic Properties of the Fe-Based Amorphous Alloy

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