Showing papers by "Albert Fert published in 1977"
TL;DR: In this paper, the authors present experimental results for the resistivity anisotropy of Ni alloys containing transition impurities and show that the Smit spin mixing mechanism is dominant in all cases where there is no d virtual bound state at the spin ↑ Fermi level.
112 citations
TL;DR: In this article, spontaneous magnetoresistance anisotropy has been measured for the ferromagnetic alloys PdNi, PdCo and PdFe, and the results confirm the conclusion drawn from other data that in Pd, Ni and Co (but not Fe) possess local orbital moments.
53 citations
TL;DR: In this article, the authors measured the resistivity of DyNi3 and HoNi3 amorphous thin films between 12k and 290k and found that the magnetic ordering at low temperature results in a definite increase of the resistivities.
Abstract: The authors have measured the resistivity of DyNi3 and HoNi3 amorphous thin films between 12K and 290K They find that the magnetic ordering at low temperature results in a definite increase of the resistivity It is shown that this positive contribution from magnetic ordering to the resistivity can be ascribed to coherent exchange scattering by neighbouring magnetic ions
35 citations
TL;DR: In this article, the magnetoresistance of gold containing rare-earth impurities in longitudinal and transverse magnetic fields was measured and the authors derived the strength of the interaction of the conduction electrons with the quadrupole moment of the $4f$ shell.
Abstract: We report measurements of the magnetoresistance of gold containing rare-earth impurities in longitudinal and transverse magnetic fields. For rare-earths with orbital magnetism the dominant effect is an anisotropic magnetoresistance due to the scattering of the conduction electrons by the electric quadrupole moment of the $4f$ shell. This effect vanishes for gadolinium impurities (no quadrupole moment). We present a model of the anisotropic magnetoresistance induced by quadrupole scattering. From the analysis of the experimental results we derive the strength of the interaction of the conduction electrons with the quadrupole moment of the $4f$ shell.
34 citations
TL;DR: In this article, the authors have taken into account the admixture of $5d$ screening electrons into the conduction band, and obtained a $4f$-conduction-electron interaction which has large anisotropic terms in addition to the conventional spin interaction.
Abstract: Rare-earth impurities in noble metals induce an anisotropic magnetoresistance and a skew scattering contribution to the Hall resistivity. These effects are due to anisotropic terms of the $4f$---conduction-electron interaction, but an estimate of these terms based on conduction electrons in plane-wave states gives values too small to explain the experimental data. We have taken into account the admixture of $5d$ screening electrons into the conduction band, and we obtain a $4f$---conduction-electron interaction which has large anisotropic terms in addition to the conventional spin interaction. We have used in this calculation atomic $4f\ensuremath{-}5d$ Slater integrals, and we also had to estimate the width of the $5d$ virtual bound state. When we assume that the $5d$ electrons are in ${t}_{2g}$ states, we find that our estimate of the anisotropy of the magnetoresistance and of the skew scattering effect are in fair agreement with the experimental data. However, we find too large a negative isotropic magnetoresistance.
30 citations
TL;DR: In this paper, the authors show that the scattering of conduction electrons by magnetic impurities depends on the current direction with respect to the impurity moments (anisotropic scattering effect) and is different to the left and to the right (skew scattering and side jump effects).
Abstract: The scattering of conduction electrons by magnetic impurities depends on the current direction with respect to the impurity moments (anisotropic scattering effect) and is different to the left and to the right (skew scattering and side-jump effects). The scattering asymmetries show up in magnetoresistance and Hall effect experiments and have been mainly studied for rare-earth impurities. They are of interest for determining the anisotropic terms of the conduction electron-impurity interaction, such as quadrupolar Coulomb terms or orbital exchange terms. In alloys with transition metal impurities they can reveal the unquenced orbital part of the magnetic moment.
19 citations
TL;DR: In this paper, the influence of a rotation of the field in the easy magnetization plane is investigated, showing the existence of antiferromagnetic domains and the results of field dependence of uniform magnon energies are reported in detail for the two compounds CoCl2 and CoBr2.
17 citations
TL;DR: In this paper, the magnetoresistance induced by rare-earth impurities in gadolinium and in the compound Zn Y was investigated and shown to be due mainly to quadrupole scattering.
Abstract: We report measurements of the magnetoresistance induced by rare-earth impurities in gadolinium and in the compound Zn Y. We found that the magnetoresistance induced by rare-earth impurities is due mainly to quadrupole scattering in gadolinium but not in Zn Y.