Journal ArticleDOI
A study of dilute alloys of iron in gold using the Mössbauer effect
Reads0
Chats0
TLDR
A detailed analysis of the Mossbauer absorption spectra of 57Fe in Au-Fe alloys has been carried through for the concentration range 05-128% at room temperature and for the 128% alloy from room temperature down to 04 °K as discussed by the authors.Abstract:
A detailed analysis of Mossbauer absorption spectra of 57Fe in Au-Fe alloys has been carried through for the concentration range 05-128% at room temperature and for the 128% alloy from room temperature down to 04 °K. The results show that significantly different spectra are obtained for iron atoms with 0, 1, 2,... iron nearest neighbours. The concentration dependence of the mean isomer shift is consistent with the changes in charge density to be expected from the changes in atomic volume. As the temperature is reduced, measurable hyperfine fields appear first at iron sites with the largest number of iron nearest neighbours. The quadrupole splitting averaged over all iron sites tends to zero as the temperature is reduced, indicating that the angle between the spin direction and the electric field gradient has a mean value close to cos -1(1/radical3).read more
Citations
More filters
Journal ArticleDOI
Magnetic Ordering in Gold-Iron Alloys
V. Cannella,J. A. Mydosh +1 more
TL;DR: In this paper, the temperature dependences of the thermoelectric power and the low-field magnetic susceptibility for Fe alloys were made of the temperature dependent on the temperature.
Journal ArticleDOI
The Au−Fe (Gold-Iron) system
Journal ArticleDOI
Generalised perturbation theory in disordered transition metal alloys: application to the self-consistent calculation of ordering energies
TL;DR: In this article, the generalised perturbation method for discussing ordering effects in transition metal alloys is extended to include charge transfer effects, and a detailed numerical discussion of the validity of this method and of the role of charge transfers is given by using simple models for the electronic structure of the pure metals.
Journal ArticleDOI
Metastable Phase Separation in Au-Fe Alloys
C. E. Violet,R. J. Borg +1 more
TL;DR: In this article, Mossbauer gave a 4,2 K d'alliages Au−Fe with concentrations in Fe of entre 10,5 and 33 at. %.
References
More filters
Journal ArticleDOI
Resistance Minimum in Dilute Magnetic Alloys
TL;DR: In this article, the scattering probability of conduction electrons to the second Born approximatism was calculated based on the s-d interaction model for dilute magnetic alloys, and it was shown that J should be negative in alloys which show a resistance minimum.
Journal ArticleDOI
Criterion for Ferromagnetism from Observations of Magnetic Isotherms
TL;DR: In this article, a criterion for determining the onset of ferromagnetism in a material as its temperature is lowered from a region in which the linearity of its magnetic moment versus field isotherm gives an indication of paramagnetisms.
Journal ArticleDOI
Mössbauer Effect in Metallic Iron
TL;DR: The Mossbauer effect in metallic iron has been studied from 4 to 1300\ifmmode^\circ\else\text degree\fi{}K, with particular emphasis on the region near the Curie temperature at 1043
Journal ArticleDOI
The ferromagnetic-antiferromagnetic properties of copper-manganese and silver-manganese alloys
TL;DR: In this article, a microscopic exchange anisotropy model was proposed to explain the magnetization displacement in alloys of about 5-30% Mn in Cu and 10-25% Mn on Ag.
Journal ArticleDOI
Remarks on magnetically dilute systems
H. Sato,A. Arrott,R. Kikuchi +2 more
TL;DR: In this article, it was shown that a Curie or Neel temperature does not appear until a finite concentration of magnetic atoms is obtained if the atomic distribution is random, but the concentration depends on the co-ordination number of the lattice and on the range of interaction.