Iron-based Amorphous Ribbons and Wires

Pankhurst, Quentin A.

doi:10.1007/978-1-4899-1763-8_3

Cited by 6 publications

(5 citation statements)

References 127 publications

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“…The spectrum of the Fe 33 Cu 33 Ag 33 sample is especially broad, and there is no sign of any crystalline-phase absorption peaks. This spectrum is similar to the broad and featureless spectra of amorphous alloy ribbons [20], and can be very well modelled using the Lines and Eibschütz model for amorphous metals. Computer fits using this model are shown in figures 3, 4 and 5.…”

Section: The Fecuag Ternary Systemsupporting

confidence: 55%

Investigation of the ternary phase diagram of mechanically alloyed FeCuAg

Cohen

Ahlswede

Wicks

et al. 1997

J. Phys.: Condens. Matter

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The structural and magnetic properties of mechanically alloyed Fe - Cu - Ag at room temperature have been investigated using Mössbauer spectroscopy, x-ray diffraction and differential scanning calorimetry. The elements are naturally immiscible, but through prolonged and energetic ball milling (70 hours at 600 rpm) one can make metastable alloys, the structure of which depends on the elemental composition. In the binary Cu - Ag and Fe - Cu systems, crystalline single-phase solid solutions result, whereas in Fe - Ag the alloying is limited, with the product a mixture of elemental particles. In the ternary system it is possible to produce copper- and silver-rich single-phase fcc alloys, but not the equivalent bcc iron-based structure. As the proportions of the three elements become more equal, the resulting structure becomes highly disordered or amorphous. The composition range of this amorphous phase is different to that observed in sputtered Fe - Cu - Ag systems.

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Section: The Fecuag Ternary Systemsupporting

confidence: 55%

Investigation of the ternary phase diagram of mechanically alloyed FeCuAg

Cohen

Ahlswede

Wicks

et al. 1997

J. Phys.: Condens. Matter

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“…As a technique for the magnetic characterization and structural analysis of solids, Mössbauer spectroscopy has provided important microscopic information for over 4 decades. , For the past 20 years, it has contributed to our understanding of the properties of new nanostructured materials . Nanostructured materials can range from crystalline to amorphous materials, and their physical properties have been investigated in detail − because the nanostructured state can lead to useful differences in the structural, magnetic, electronic, and chemical properties of materials. − Perhaps the major interest in recent magnetic and Mössbauer spectral studies of nanostructured materials lies less with materials that simply have nanoscale sizes but, rather, with materials that have purposely been synthesized to have a unique nanostructure. − This type of study is well illustrated by the work of Herr et al on the 77 K spectrum of nanostructured iron.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and Mössbauer Spectral Study of Core/Shell Structured Fe/Au Nanoparticles

et al. 2006

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Fe/Au nanoparticles have been chemically synthesized through a reverse micelle reaction and investigated by both conventional and synchrotron based x-ray diffraction and by magnetic and Mössbauer spectral studies. The powder x-ray diffraction patterns reveal both the presence of crystalline α-iron and gold and the absence of any crystalline iron oxides or other crystalline products. First-order reversal curves, along with the major hysteresis loops of the Fe/Au nanoparticles have been measured as a function of time in order to investigate the evolution of their magnetic properties. The iron-57 Mössbauer spectra of both uncoated iron nanoparticles and the Fe/Au nanoparticles have been measured at 78 and 295 K and indicate that two major iron containing components are present, namely the expected α-iron and the unexpected amorphous Fe 1-x B x alloy; several poorly crystallized ordered iron(III) oxide components as well as paramagnetic iron(II) and iron(III) components are also observed. These results indicate that the Fe-core/Aushell nanoparticles synthesized through reverse micelles are far more complex that had been believed.

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“…About 15% of the 57 Fe probes sit in these environments. This behaviour is described in other papers [2,5,6] too, in which the spectra were analysed more thoroughly. In these investigations also other crystallization products like Fe 3 B and Fe 2 B could be identified.…”

Section: Mössbauer Investigationsmentioning

confidence: 87%

“…The spectra were interpreted by a dominating magnetic hyperfine interaction and superimposed quadrupole frequency distributions [1,2]. But an unambiguous analysis of the spectra is not a simple task and it was an advantage when it was possible to separate the quadrupole interaction by a radio frequency field [3].…”

Section: Introductionmentioning

confidence: 99%