Structural and Mössbauer studies of aerosol FeCu nanoparticles in a wide composition range

Shafranovsky, E. A.; Petrov, Yu. I.; Casas, Lluı̀s; Molins, Elı́es

doi:10.1007/s11051-011-0470-4

Cited by 20 publications

(33 citation statements)

References 66 publications

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“…In our work [106] both states of fcc Fe are clearly manifested in the Mössbauer spectra of Fe-rich FeCu systems in the form of a second sextet with a hyperfine field of H i ≈ 30.0 T (FM fcc Fe) and a concomitant singlet attributed to PM fcc Fe. Indeed, this singlet coexists and probably gradually disappears together with the second sextet with increasing Cu content in the sample from 4.9 to 35.3 at.%.…”

mentioning

confidence: 50%

“…They have a complicated core-shell structure. This is evidenced by electron microscopy images and Fourier analysis for FeCu (50.4 at.%) particles after 2 years of exposure to air (Figure 31) [106,118]. The core has a size of about 12 nm.…”

Section: 47mentioning

confidence: 85%

“…The results of work [106] show that the PM fcc Fe in Cu-rich FeCu systems appears only after heat treatment resulting in coarsening the Fe aggregations inwards or on the surface of Cu grains.…”

Section: 47mentioning

confidence: 96%

“…The results of early measurements for mechanical, electrical, and magnetic properties of similar metastable alloys have been summarized in a monograph [67]. References to numerous later works are given in [106].…”

Section: 47mentioning

confidence: 99%

“…An attempt to clarify these discrepancies based on studies of the structure and the magnetic state of aerosol FeCu nanoparticles in a wide composition range has been undertaken in a work [106]. Distinct features of the gas evaporation technique are a possibility to quench a hightemperature homogeneous solution and a fast attainment of the equilibrium state owing the atoms to diffuse into immiscible components as the particles are separated during their cooling in the inert gas atmosphere.…”

Section: 47mentioning

confidence: 99%

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Structure and Magnetic Properties of Aerosol Nanoparticles of Fe and Its Alloys

Petrov

Shafranovsky

2012

International Journal of Inorganic Chemistry

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Structure and magnetic properties of aerosol nanoparticles of Fe and its alloys (FeMn, FeNi, FeNiMn, FePt, FeCr, FeCo, and FeCu) have been reviewed. It has been shown that, compared to a bulk material, the particles have a number of specific features being of much fundamental and applied interest. The effect of both a quenched high-temperature Fe modification and its oxides on the structure and magnetism of nanoparticles has been considered in detail. Particular attention has been paid to the recently observed fine structure in the hyperfine field distribution at iron nuclei in Mössbauer spectra for pure iron and its alloys both as a bulk and aerosol nanoparticles. This phenomenon makes it possible to reveal very weak magnetic interactions in the system under study. The plausible origin of these magnetic interactions has been also discussed.

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confidence: 50%

Section: 47mentioning

confidence: 85%

Section: 47mentioning

confidence: 96%

Section: 47mentioning

confidence: 99%

Section: 47mentioning

confidence: 99%

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Structure and Magnetic Properties of Aerosol Nanoparticles of Fe and Its Alloys

Petrov

Shafranovsky

2012

International Journal of Inorganic Chemistry

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Large Scale Monodisperse Hexagonal Arrays of Superparamagnetic Iron Oxides Nanodots: A Facile Block Copolymer Inclusion Method

Ghoshal

Maity²,

Godsell³

et al. 2012

Advanced Materials

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Highly dense hexagonal ordered arrays of superparamagnetic iron oxides nanodots are fabricated by a simple and cost-effective route. Spectroscopic, microscopic and magnetic measurements show that the nanodots have uniform size, shape and their placement mimics the original self-assembled block copolymer pattern. The nanodots show good thermal stability and strong adherence to the substrate surface, making them useful for practical device applications.

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High‐Temperature Ferromagnetism of the Iron‐Based FCC Phase: The Effect of Carbon and Nickel

Уймин

Yermakov

Королев

et al. 2022

Physica Status Solidi (b)

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The phase composition and magnetic properties of FeNi nanoparticles encapsulated in carbon with a nickel content of about 10% are studied in comparison with FeNi nanoparticles of similar composition without carbon coating. The Fe91Ni9 particles have the body centered cubic structure, whereas the Fe88Ni12@C particles have the face centered cubic (FCC) structure. The Fe88Ni12@C particles are characterized with a rather high magnetization of 60 emu g−1 in the field of 30 kOe at 5 K and 40 emu g−1 at 300 K. The monotonous behavior of magnetization with temperature gives grounds to assume that the Fe88Ni12@C particles retain the FCC structure over the entire temperature range down to 5 K. It is concluded that the stabilization of FCC phase of Fe88Ni12@C and the ferromagnetic state of this FCC phase are related to a large concentration of carbon in the core of the nanoparticles.

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Structural and Mössbauer studies of aerosol FeCu nanoparticles in a wide composition range

Cited by 20 publications

References 66 publications

Structure and Magnetic Properties of Aerosol Nanoparticles of Fe and Its Alloys

Structure and Magnetic Properties of Aerosol Nanoparticles of Fe and Its Alloys

Large Scale Monodisperse Hexagonal Arrays of Superparamagnetic Iron Oxides Nanodots: A Facile Block Copolymer Inclusion Method

High‐Temperature Ferromagnetism of the Iron‐Based FCC Phase: The Effect of Carbon and Nickel

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