Magnetic properties of metastable bcc phase in Fe64Ni36 alloy synthesized through polyol process

Jacob, G. Antilen; Sellaiyan, S.; Uedono, Akira; Joseyphus, R. Justin

doi:10.1007/s00339-020-3292-3

Cited by 15 publications

(10 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[14] However, chemical methods are found to produce various metastable phases in Ni-based alloys that are different from the bulk. [7] The crystallite sizes of the prepared samples assuming spherical shape calculated using Scherrer's formula are 10, 23, and 11 nm for Ni43, Ni63, and Ni66, respectively. The absence of hexagonal (P6 3 /mmc) or other intermediate phases indicates fcc solid solution of the alloy for Ni43 and Ni63, with structure similar to Ni.…”

Section: Structural Analysismentioning

confidence: 98%

“…Curie transition (T C ) of Ni63 samples is visible, preceded by the magnetic susceptibility-dependent increase in weight due to Hopkinson's effect. [7,23] From the first derivatives of the respective samples, it could be understood that apart from the weight loss due to loss of water molecules at 100 C and the weight loss due to the organic surface layers, the Ni63 has a major weight loss at 340 C due to the T C , which is absent in Ni43. The estimated weight loss due to the removal of volatile substances is around 5-10% from the thermogravimetric analysis (TGA) preceding the Hopkinson hump.…”

Section: Thermo-magnetic Analysismentioning

confidence: 99%

“…[6] The Curie temperature (T C ) of metastable bcc phase has been enhanced above 450 C along with improved magnetic moment in FeNi alloy. [7] Ferromagnetic Cu-Ni alloy has been synthesized through pulsed electrodeposition by controlling the bath parameters. [8] However, the saturation magnetization (6 emu g À1 ) is poor in the as-deposited state due to the nonmagnetic nature of Cu that reduces the exchange interaction.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structure and Magnetic Properties of Pulsed Electrodeposited Nickel–Indium Alloy

Sivaranjani

Anbalagan

Dhanavel

et al. 2021

Physica Status Solidi (b)

View full text Add to dashboard Cite

A nickel-indium (Ni-In) ferromagnetic alloy is successfully synthesized through a facile pulsed electrodeposition method. The composition, structure, and morphology are analyzed through atomic absorption spectroscopy (AAS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and electron microscopy. The composition and structural analysis indicate fcc phase for the Ni 43 In 57 and Ni 63 In 37 alloys. The Ni-In alloy shows mixed phases when the Ni content is increased from 63 to 66 at%. Thermal analysis of the Ni 63 In 37 results in an activation energy of 46 and 557 kJ mol À1 that can arise from the grain growth phenomena and phase transformation, respectively. Thermomagnetic studies show a Curie temperature of 340 C for the Ni-In alloy with 63 at% Ni that also exhibits a saturation magnetization of 36 emu g À1 .

show abstract

Section: Structural Analysismentioning

confidence: 98%

Section: Thermo-magnetic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structure and Magnetic Properties of Pulsed Electrodeposited Nickel–Indium Alloy

Sivaranjani

Anbalagan

Dhanavel

et al. 2021

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

“…[ 11 ] Recently, the polyol process has been found to be promising to obtain composition‐controlled Fe‐based alloys with tunable magnetic properties. [ 12,13 ] Jacob et al [ 14 ] have shown that the bcc Fe 64 Ni 36 obtained through a polyol process transformed to fcc phase on annealing, enhancing the T c by 30 K. These results suggest the possibility of enhancing the T c in fcc NiCu alloys by the substitution of Fe within its limited miscibility range (<5 at%) in the Ni–Cu–Fe system. [ 15 ]…”

Section: Introductionmentioning

confidence: 99%

Enhanced Curie Temperature and Critical Exponents of Fe‐Substituted NiCu Alloy

Jacob

Joseyphus

2021

Physica Status Solidi (a)

Self Cite

View full text Add to dashboard Cite

The magnetic moment and the Curie temperature of the NiCu alloy decrease to a large extent with Cu. A Ni60Cu40 alloy with Fe substitutions up to 2 at% using a polyol‐mediated synthesis process resulting in enhanced magnetic properties is obtained. The Ni60Cu39Fe1 and Ni60Cu38Fe2 alloys show fcc phase with the Curie temperatures of 237 and 266 K, respectively. The room temperature magnetization measurement shows paramagnetic behavior, whereas, at 15 K, the 1 at% Fe‐substituted alloy exhibits a saturation magnetization of 20 emu g−1 that increases by 25% with 2 at% Fe. The positive slope in the Arrott plot confirms the second‐order phase transition in the alloys. The maximum magnetic entropy change (MCE) is observed as 0.101 J kg−1 K−1 for the Ni60Cu39Fe1 alloy with the peak temperature of 238 K in an applied magnetic field of 0.5 T. The critical exponent (β) calculated using the MCE method is in the range of 0.576(3)–0.587(3) for the alloys, whereas the values obtained using the Kouvel‐Fisher (KF) method are 0.523(3)–0.565(2). The extracted β values are slightly greater than the mean‐field model suggesting clustering behavior in the alloys.

show abstract

“…Fabrication of iron-nickel alloyed micro-/nanoparticles has been achieved by various physical and chemical methods such as mechanical alloy [33], chemical reduction in solution [34], chemical vapor deposition [35], physical vapor deposition [36], sol-gel combined with hydrogen reduction [37], sol-gel combustion [38], vacuum evaporation [39], electroless plating [40], chemical reduction based on the polyol process [41], microemulsion method [42], hydrothermal reduction [43], etc. Most of these processes usually require complex precursors and/or surfactants, which increase production costs and introduce impurities, resulting in noticeable declines in the properties of the structures [44].…”

Section: Introductionmentioning

confidence: 99%

Iron-Nickel Alloy with Starfish-like Shape and Its Unique Magnetic Properties: Effect of Reaction Volume and Metal Concentration on the Synthesized Alloy

et al. 2021

View full text Add to dashboard Cite

Iron-nickel alloy is an example of bimetallic nanostructures magnetic alloy, which receives intensive and significant attention in recent years due to its desirable superior ferromagnetic and mechanical characteristics. In this work, a unique starfish-like shape of an iron-nickel alloy with unique magnetic properties was presented using a simple, effective, high purity, and low-cost chemical reduction. There is no report on the synthesis of such novel shape without complex precursors and/or surfactants that increase production costs and introduce impurities, so far. The synthesis of five magnetic iron-nickel alloys with varying iron to nickel molar ratios (10–50% Fe) was undertaken by simultaneously reducing Fe(II) and Ni(II) solution using hydrazine hydrate as a reducing agent in strong alkaline media for 15 min at 95–98 °C. The effect of reaction volume and total metal concentration on the properties of the synthesized alloys was studied. Alloy morphology, chemical composition, crystal structure, thermal stability, and magnetic properties of synthesized iron-nickel alloys were characterized by means of SEM, TEM, EDX, XRD, DSC and VSM. ImageJ software was used to calculate the size of the synthesized alloys. A deviation from Vegard’s law was recorded for iron molar ration higher than 30%., in which superstructure phase of FeNi3 was formed and the presence of defects in it, as well as the dimensional effects of nanocrystals. The saturation magnetization (Ms), coercivity (Hc), retentivity (Mr), and squareness are strongly affected by the molar ratio of iron and nickel and reaction volume as well as the total metal concentration.

show abstract

Magnetic properties of metastable bcc phase in Fe64Ni36 alloy synthesized through polyol process

Cited by 15 publications

References 43 publications

Structure and Magnetic Properties of Pulsed Electrodeposited Nickel–Indium Alloy

Structure and Magnetic Properties of Pulsed Electrodeposited Nickel–Indium Alloy

Enhanced Curie Temperature and Critical Exponents of Fe‐Substituted NiCu Alloy

Iron-Nickel Alloy with Starfish-like Shape and Its Unique Magnetic Properties: Effect of Reaction Volume and Metal Concentration on the Synthesized Alloy

Contact Info

Product

Resources

About