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Sökning: WFRF:(van Schilfgaarde M.)

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  • Dubrovinsky, L, et al. (författare)
  • Pressure-induced invar effect in Fe-Ni alloys
  • 2001
  • Ingår i: PHYSICAL REVIEW LETTERS. - 0031-9007. ; 86:21, s. 4851-4854
  • Tidskriftsartikel (refereegranskat)abstract
    • We have measured the pressure-volume (P-V) relations for cubic iron-nickel alloys for three different compositions: Fe0.64Ni0.36, Fe0.55Ni0.45, and Fe0.20Ni0.80. It is observed that for a certain pressure range the bulk modulus does not change or can even
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5.
  • Panda, Swarup K., et al. (författare)
  • High photon energy spectroscopy of NiO : Experiment and theory
  • 2016
  • Ingår i: PHYSICAL REVIEW B. - 2469-9950. ; 93:23
  • Tidskriftsartikel (refereegranskat)abstract
    • We have revisited the valence band electronic structure of NiO by means of hard x-ray photoemission spectroscopy (HAXPES) together with theoretical calculations using both the GW method and the local density approximation + dynamical mean-field theory (LDA+DMFT) approaches. The effective impurity problem in DMFT is solved through the exact diagonalization (ED) method. We show that the LDA+DMFT method in conjunction with the standard fully localized limit (FLL) and around mean field (AMF) double-counting alone cannot explain all the observed structures in the HAXPES spectra. GW corrections are required for the O bands and Ni-s and p derived states to properly position their binding energies. Our results establish that a combination of the GW and DMFT methods is necessary for correctly describing the electronic structure of NiO in a proper ab initio framework. We also demonstrate that the inclusion of photoionization cross section is crucial to interpret the HAXPES spectra of NiO. We argue that our conclusions are general and that the here suggested approach is appropriate for any complex transition metal oxide.
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6.
  • van, Schilfgaarde M, et al. (författare)
  • Origin of the Invar effect in iron-nickel alloys
  • 1999
  • Ingår i: NATURE. - : MACMILLAN MAGAZINES LTD. - 0028-0836. ; 400:6739, s. 46-49
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • In 1897 Guillaume(1) discovered that face-centred cubic alloys of iron and nickel with a nickel concentration of around 35 atomic per cent exhibit anomalously low (almost zero) thermal expansion over a wide temperature range. This effect, known as the Inv
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  • Resultat 1-6 av 6

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