The Paramagnetic Susceptibility of Copper-Nickel and Zinc-Nickel Alloys

Wheeler, Mary A.

doi:10.1103/physrev.56.1137

Cited by 17 publications

(3 citation statements)

References 6 publications

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“…The work of Alder (1916) provided data (shown in fig. 1) for both saturation magnetic moments and Curie temperatures; the date of this work would seem to justify a re-investigation, but the Curie point results are confirmed by later workers (Krupkowski 1929, Marian 1937, Wheeler 1939. Saturation moment U and Curie temperature 0 fall linearly with copper content and extrapolate to zero at 60% copper; the alloy of highest copper content for which measurements were made contained 38% copper.…”

Section: $ 2 P H a S E E Q U I L I B R I A A N D C R Y S T A L S T R supporting

confidence: 62%

Polarization of Undulator Radiation

Kitamura

1980

Jpn. J. Appl. Phys.

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A comparison is made of the magnetic, electrical and thermo-electric properties of alloys in the two systems, and the lattice spacings, optical properties, electronic specific heat, and x-ray spectroscopy of the nickel-copper alloys are also considered Palladium-silver alloys show the behaviour expected of them on the band theory of metals, but nickel-copper alloys show well-marked and consistent deviations. It is concluded that unoccupied d-electron levels exist in the copper-rich alloys, whereas such levels do not exist in the silver-rich palladium-silver alloys From theoretical considerations it seems unlikely that the unoccupied levels form part of a collective d-band, and alternative models are discussed That the two systems differ so markedly IS surprising, but a tentative explanation of the differences is sought in the differing proportions of the atomic volume occupied by the ions in copper and in silver

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Section: $ 2 P H a S E E Q U I L I B R I A A N D C R Y S T A L S T R supporting

confidence: 62%

Polarization of Undulator Radiation

Kitamura

1980

Jpn. J. Appl. Phys.

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“…When nickel is alloyed with zinc, the 4s electrons supplied by zinc will tend to fall into the holes in the 3d band of the alloy until the 3d band is full. This will occur at 30% zinc according to the previous studies . Hence, for as-prepared Ni 5 Zn 21 alloy nanowires, it should have shown no ferromagnetism because the holes of the 3d band of the alloy have been filled and the ferromagnetic moments tend to be zero.…”

Section: Resultsmentioning

confidence: 87%

“…This will occur at 30% zinc according to the previous studies. 27 Hence, for as-prepared Ni 5 Zn 21 alloy nanowires, it should have shown no ferromagnetism because the holes of the 3d band of the alloy have been filled and the ferromagnetic moments tend to be zero. However, the magnetic hysteresis loops demonstrate that soft ferromagnetism exists at least at 100 K. This further illustrates the existence of Ni-rich microzones in the as-prepared Ni 5 Zn 21 nanowires again.…”

Section: Morphology and Structures Of Ni 5 Zn 21 Alloy Nanowiresmentioning

confidence: 99%

Structural, Magnetic, and Magnetoresistive Properties of Electrodeposited Ni₅Zn₂₁ Alloy Nanowires

et al. 2006

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Ni5Zn21 alloy nanowires were fabricated through template-assisted electrochemical deposition method. The morphology and microstructures of as-deposited nanowires were determined by field-emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), electron diffraction (ED), and electron probe microanalysis (EPMA). The accurate composition was measured via induced coupling plasma atomic emission spectroscopy. SEM results show that Ni5Zn21 nanowires are deposited in most of the nanopores of the template, and they are continuous and dense throughout the whole length. The XRD result demonstrates that the nanowires are mainly composed of a cubic gamma phase Ni5Zn21 alloy, but there also exists a trace of Zn-rich eta phase. HRTEM and ED reveal that the alloy nanowires are polycrystalline with the crystallite size of several tens of nanometers. EPMA of a single nanowire illustrates that there exist Ni-rich microzones in as-deposited nanowires. Subsequent magnetic measurements of the array also confirmed the existence of them. In addition, it can be further inferred that the shape of Ni-rich microzones is probably barlike or disklike, from the anisotropy of zero field cooling/field cooling (ZFC/FC) curves as well as the vortex magnetization behavior of the Ni5Zn21 nanowire array. The low-temperature magnetoresistance of the Ni5Zn21 nanowire array was also measured. Giant magnetoresistance instead of anisotropic magnetoresistance is suggested to be responsible for contributing to the magnetoresistance.

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