The activation energy for γ-Fe precipitates inCuFe

Klein, Jean‐Paul; Heck, T.; Campbell, S. J.; Aubertin, F.; Gonser, U.

doi:10.1007/bf02396133

Cited by 5 publications

(10 citation statements)

References 11 publications

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“…It is known long time ago that the Mössbauer spectra for Cu-rich condensates having an fcc structure show a central paramagnetic peak of complicated shape (see, e.g., [5,109,110]). Its nature is still insufficiently clear.…”

Section: 47mentioning

confidence: 99%

“…The paramagnetic peak in the Mössbauer spectra of metastable FeCu alloys with a large Cu content has been a subject of many studies [110,119,120]. It is often connected with the presence of a high-temperature fcc iron modification which should be paramagnetic at room temperature.…”

Section: 47mentioning

confidence: 99%

“…Klein et al [110] have defined optimum conditions for the precipitation of the fcc Fe from metastable CuFe (3 at.%) solutions produced by alloying the components in a quartz sealed-off tube. The prepared alloy was rolled to a thin foil, annealed to homogenize it in a high vacuum at 990…”

Section: 47mentioning

confidence: 99%

“…The existence of an FM fcc Fe state and its role in the behavior of the FeCu [110,128] is difficult to understand as this state should remain at room temperature. This FM state in fcc iron has been firstly revealed by extremely rapid quenching of aerosol Fe particles of 50 nm diameter [43].…”

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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Section: 47mentioning

confidence: 99%

Section: 47mentioning

confidence: 99%

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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“…Full details of the Cu,,Fe, sample preparation have been given previously [17]. The homogenising and annealing heat treatments were carried out in vacuum (4 x lop4 Pa) using a standard horizontal furnace.…”

Section: Methodsmentioning

confidence: 99%

γ‐Fe Precipitation in Cu₉₇Fe₃ and Cu₇₅Au₂₄Fe₁

Klein

Campbell

Aubertin

et al. 1991

Physica Status Solidi (b)

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A series of isothermal and isochronal heat treatments (300 to 800 °C; 0 to 92 h) is used to compare the precipitation of f.c.c. γ‐Fe in Cu97Fe3 with that in Cu75Au24Fe1 as determined by room temperature Mössbauer spectroscopy. The precipitation process is similar in both systems with up to 90% and 70% of the Fe in Cu97Fe3 and Cu75Au24Fe1, respectively, being precipitated in the form of γ‐Fe. Low temperature measurements (15 K) in zero and applied magnetic fields (5.3 T) on γ‐Fe in the Cu75Au24Fe1 sample show magnetic behaviour similar to that of the familiar low moment, low atomic volume γ1‐state of Fe rather than the high moment γ2‐state expected of this matrix of high atomic volume.

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