Preparation and magnetic properties of ultrafine particles of FeNi alloys

Li, X.G.; Chiba, Akihiko; Takahashi, Seiki

doi:10.1016/s0304-8853(97)00039-5

Cited by 131 publications

(83 citation statements)

References 9 publications

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“…2a). The XRD patterns of Ni 0.67 Fe 0.33 and Ni 0.27 Fe 0.73 particles can be indexed to the fcc structure with shifting of the Bragg peaks to lower angles (see Supplementary Information, Table S2), which is consistent with previous reports for bulk [19] and nanoparticle [20][21][22] alloys of NiFe. Using Bragg's law, the calculated lattice spacing for the (111) planes of Ni 0.27 Fe 0.73 particles is 0.21 nm and agrees with the HRTEM observation (Fig 2b).…”

supporting

confidence: 90%

Synergistic Effects in Bimetallic Nanoparticles for Low Temperature Carbon Nanotube Growth

2008

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Dimensionally and compositionally tuned bimetallic nanoparticles are synthesized in an atmospheric pressure microplasma reactor and found to catalyze carbon nanotube (CNT) growth at lower temperatures and higher growth rates than monometallic nanoparticles. Kinetic studies show that the activation energy for CNT growth is lowered substantially with nanoparticle alloys, demonstrating that intrinsic catalytic activity is intimately related to chemical composition.

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supporting

confidence: 90%

Synergistic Effects in Bimetallic Nanoparticles for Low Temperature Carbon Nanotube Growth

2008

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“…This finding corresponds with the previously published reports. 21 Note that the peak of (220) is not plotted due to the high intensity of the silicon peak present at 2h near 69 . When FeNi was doped with Mo, the structure of the film started to change from polycrystalline to amorphous.…”

Section: B Microstructure Characterizationmentioning

confidence: 99%

“…The lattice constant also agreed well with the values reported previously. 21,22 In the range of higher Mo content, the corresponding lattice constant and grain size are about 3.55 Å and 22 Å , respectively. However, these values are only rough estimates.…”

Section: B Microstructure Characterizationmentioning

confidence: 99%

Development of FeNiMoB thin film materials for microfabricated magnetoelastic sensors

Cai

Gooneratne

Cha

et al. 2012

Journal of Applied Physics

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MetglasTM 2826MB foils of 25–30 μm thickness with the composition of Fe40Ni38Mo4B18 have been used for magnetoelastic sensors in various applications over many years. This work is directed at the investigation of ∼3 μm thick iron-nickel-molybdenum-boron (FeNiMoB) thin films that are intended for integrated microsystems. The films are deposited on Si substrate by co-sputtering of iron-nickel (FeNi), molybdenum (Mo), and boron (B) targets. The results show that dopants of Mo and B can significantly change the microstructure and magnetic properties of FeNi materials. When FeNi is doped with only Mo its crystal structure changes from polycrystalline to amorphous with the increase of dopant concentration; the transition point is found at about 10 at. % of Mo content. A significant change in anisotropic magnetic properties of FeNi is also observed as the Mo dopant level increases. The coercivity of FeNi films doped with Mo decreases to a value less than one third of the value without dopant. Doping the FeNi with B together with Mo considerably decreases the value of coercivity and the out-of-plane magnetic anisotropy properties, and it also greatly changes the microstructure of the material. In addition, doping B to FeNiMo remarkably reduces the remanence of the material. The film material that is fabricated using an optimized process is magnetically as soft as amorphous MetglasTM 2826MB with a coercivity of less than 40 Am−1. The findings of this study provide us a better understanding of the effects of the compositions and microstructure of FeNiMoB thin film materials on their magnetic properties.

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“…1 Transition metal alloys and compounds have been studied extensively in the past several decades for their increasing utility in electronic and energy conversion devices. 2 As important transition metal alloys, iron-nickel alloys are of great interest due to their useful magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of FeNi₃ Alloyed Nanoparticles by Hydrothermal Reduction

2006

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The present paper presents a facile and low-cost hydrothermal method to synthesize stoichiometric FeNi 3 alloy nanoparticles by reducing Ni(NO 3 ) 2 ‚6H 2 O and Fe(NO 3 ) 2 ‚9H 2 O with hydrazine hydrate in strong alkaline media. X-ray diffraction patterns of as-prepared samples synthesized at 180°C for different hydrothermal reaction times reveal that the products are pure stoichiometric FeNi 3 alloyed nanoparticles with well-defined crystalline cubic structure when the hydrothermal time is above 2 h, while no crystal phases are detected in the product obtained under ambient pressure in an open system from the same starting prescription. Transmission electron microscopic images show that the size of the as-prepared nanoparticles increases with prolongation of the hydrothermal reaction time. The as-prepared sample has the symmetric hysteresis loop behavior of ferromagnetic materials.

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Preparation and magnetic properties of ultrafine particles of FeNi alloys

Cited by 131 publications

References 9 publications

Synergistic Effects in Bimetallic Nanoparticles for Low Temperature Carbon Nanotube Growth

Synergistic Effects in Bimetallic Nanoparticles for Low Temperature Carbon Nanotube Growth

Development of FeNiMoB thin film materials for microfabricated magnetoelastic sensors

Synthesis of FeNi₃ Alloyed Nanoparticles by Hydrothermal Reduction

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Preparation and magnetic properties of ultrafine particles of FeNi alloys

Cited by 131 publications

References 9 publications

Synergistic Effects in Bimetallic Nanoparticles for Low Temperature Carbon Nanotube Growth

Synergistic Effects in Bimetallic Nanoparticles for Low Temperature Carbon Nanotube Growth

Development of FeNiMoB thin film materials for microfabricated magnetoelastic sensors

Synthesis of FeNi3 Alloyed Nanoparticles by Hydrothermal Reduction

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Synthesis of FeNi₃ Alloyed Nanoparticles by Hydrothermal Reduction