Spin-orbit coupling, exchange interaction, and hybridization in the photoexcitation of the Ni 3pcore level

Resonant Valence-Band Satellites at the Ni-3p Edge of Ni3Al, Ni3Ga and Ni3In

“…We need to point out here the E B value of the Ni-3p 3/2 level for Ni 3 Ga is 66.8 eV at hν = 140 eV. This value is exactly the same as that reported for Ni at hν = 248 eV, 18 and is only 0.1 eV higher than that obtained from XPS work on Ni 3 Ga. 10 This means that the photon energy is calibrated to an accuracy of within 0.1 eV in this study. The energy drift during the course of these experiments was less was than 0.1 eV, which was constantly checked with the Al-2p, Ga-3d, or In-4d core levels.…”

Spin-resolved photoemission of valence-band satellites of Ni

“…Our results support the recently observed spin-resolved photoemission spectra of valence-band and core-level satellites of Ni, where a large intra-atomic electrostatic interaction between valence electrons and photoproduced hole as well as inter-atomic hybridization cause the satellite structures. [13][14][15] Recently, Tanaka and Jo 23 calculated the spectral profile of the valence-band satellites of Ni from the viewpoint of the configuration interaction using the impurity Anderson model adopting atomic multiplets. In the model, the itinerant character of Ni 3d electrons is not treated explicitly but is adopted as the hybridization between 3d states and other valence states.…”

“…So far, the electronic structure of ferromagnetic Ni has been the subject of intensive studies for many years. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] In Ni, 3d electrons are strongly correlated and the effective Coulomb interaction between 3d electrons is of the same magnitude as twice that of the bandwidth. 4 In the valence band spectra of Ni, electron correlation effects appear as a reduction of the valence bandwidth compared with that expected by a one-electron approximation and satellites which are observed up to 30 eV below the Fermi level.…”

Designing Rare-Earth Free Permanent Magnets in Heusler Alloys Via Interstitial Doping

“…where ξ i denotes the atomic SOC constant and ∆µ i is the orbital moment difference between the magnetization directions parallel to [001] and [100] for the i-th atom. We note that such a model is best applicable for strong magnets where the majority spin channel is almost fully occupied, whereas there is a more general formula considering the spin-flip and quadruple terms [50]. Taking Ni 2 FeGa as an example, Table 2 The change in c/a from 1.35 to 1.40 has minor influence on the MCA and orbit moment.…”