Nanocrystalline structures obtained by the crystallization of an amorphous Fe40Ni38B18Mo4 soft magnetic alloy

Ramanujan, R.V.; Du, S.W.

doi:10.1016/j.jallcom.2005.10.096

Cited by 21 publications

(21 citation statements)

References 42 publications

(43 reference statements)

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“…It was observed that there was no significant change in the crystallite size with annealing. Ramanujan et al [10]. reported the effect of molybdenum on the crystallization of FeNiMoB ribbons.…”

Section: Structural Analysismentioning

confidence: 99%

“…Various reports are available in literature regarding the kinetics of crystallization of Fe 40 Ni 38 Mo 4 B 16 [6,7,[9][10][11]. The enthalpy of formation and activation energy can be evaluated by employing various methods such as the Kissinger [12], Moyniham [13], and Marseglia [14] techniques.…”

mentioning

confidence: 99%

“…The enthalpy of formation and activation energy can be evaluated by employing various methods such as the Kissinger [12], Moyniham [13], and Marseglia [14] techniques. Fe-Ni-Mo-B follows a two-stage crystallization process [6,7,10]. The first stage is the Fe-Ni phase, which crystallizes by primary crystallization; the second phase is (FeNiMo) 23 [6,7,10].…”

mentioning

confidence: 99%

“…Fe-Ni-Mo-B follows a two-stage crystallization process [6,7,10]. The first stage is the Fe-Ni phase, which crystallizes by primary crystallization; the second phase is (FeNiMo) 23 [6,7,10]. The as-prepared ribbons are amorphous and crystallization takes place with heat treatments.…”

mentioning

confidence: 99%

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Structural, topographical and magnetic evolution of RF-sputtered Fe-Ni alloy based thin films with thermal annealing

Lisha¹,

Thomas²,

Geetha³

et al. 2014

Mater. Res. Express

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Metglas 2826 MB having a nominal composition of Fe 40 Ni 38 Mo 4 B 18 is an excellent soft magnetic material and finds application in sensors and memory heads. However, the thin-film forms of Fe 40 Ni 38 Mo 4 B 18 are seldom studied, although they are important in micro-electro-mechanical systems/nano-electromechanical systems devices. The stoichiometry of the film plays a vital role in determining the structural and magnetic properties of Fe 40 Ni 38 Mo 4 B 18 thin films: retaining the composition in thin films is a challenge. Thin films of 52 nm thickness were fabricated by RF sputtering technique on silicon substrate from a target of nominal composition of Fe 40 Ni 38 Mo 4 B 18 . The films were annealed at temperatures of 400°C and 600°C. The micro-structural studies of films using glancing x-ray diffractometer (GXRD) and transmission electron microscope (TEM) revealed that pristine films are crystalline with (FeNiMo) 23 B 6 phase. Atomic force microscope (AFM) images were subjected to power spectral density analysis to understand the probable surface evolution mechanism during sputtering and annealing. X-ray photoelectron spectroscopy (XPS) was employed to determine the film composition. The sluggish growth of crystallites with annealing is attributed to the presence of molybdenum in the thin film. The observed changes in magnetic properties were correlated with annealing induced structural, compositional and morphological changes.

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Section: Structural Analysismentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Structural, topographical and magnetic evolution of RF-sputtered Fe-Ni alloy based thin films with thermal annealing

Lisha¹,

Thomas²,

Geetha³

et al. 2014

Mater. Res. Express

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“…The nanocrystalline Fe 40 Ni 38 Mo 4 B 18 alloy, which exhibits positive magnetostriction, is a new nanocrystalline soft magnetic material. The nanostructured Fe 40 Ni 38 Mo 4 B 18 specimens, obtained by annealing of the amorphous alloy in the temperature range from 650 K to 1060 K have the microstructure of a γ-FeNi crystallites with average grain size 10 nm, embedded in a * corresponding author; e-mail: eva.komova@tuke.sk residual amorphous matrix [4,5]. In this article we investigate the inuence of Joule-heating and crystallization on the GMI eect in Fe 40 Ni 38 Mo 4 B 18 wires.…”

Section: Introductionmentioning

confidence: 99%

GMI Effect in Annealed Fe_{40}Ni_{38}Mo_{4}B_{18} Microwires

Komova¹,

Šidík²,

Klein³

et al. 2014

Acta Phys. Pol. A

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Amorphous glass-coated microwires are ideal material for miniaturized applications for sensing the temperature, stress and magnetic eld. One of the key parameters for future applications is their time and thermal stability. It has been shown that stability can be improved by using nanocrystalline materials that combine good soft magnetic properties of amorphous matrix with high structural stability of crystalline grains. Such nanocrystalline materials are usually obtained by annealing of amorphous precursor. In the given contribution, the inuence of dc current annealing on the domain structure and GMI eect in amorphous and nanocrystalline Fe40Ni38Mo4B18 magnetic microwire has been studied. The annealing induces additional circular magnetic anisotropy, stress relief and structure homogenization. However, the increase of magnetostriction results in the decrease of GMI. Annealing at optimum crystallisation temperature results in an increase of the relative permeability due to the formation of the nanosized grains. Consequently, GMI amplitude is comparable to that of as-cast state.

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Magnetically Bistable Microwires: Properties and Applications for Magnetic Field, Temperature, and Stress Sensing

Varga

Klein

Sabol

et al. 2017

High Performance Soft Magnetic Materials

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Nanocrystalline structures obtained by the crystallization of an amorphous Fe40Ni38B18Mo4 soft magnetic alloy

Cited by 21 publications

References 42 publications

Structural, topographical and magnetic evolution of RF-sputtered Fe-Ni alloy based thin films with thermal annealing

Structural, topographical and magnetic evolution of RF-sputtered Fe-Ni alloy based thin films with thermal annealing

GMI Effect in Annealed Fe_{40}Ni_{38}Mo_{4}B_{18} Microwires

Magnetically Bistable Microwires: Properties and Applications for Magnetic Field, Temperature, and Stress Sensing

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