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  1. No Access

    Chapter and Conference Paper

    Theory of X-Ray Absorption

    This contribution concerns the interpretation of x-ray absorption spectra for the determination of the electronic structure. This subject has gained much impetus in recent years as a direct consequence of the ...

    … in Synchrotron Radiation: Selected Experiments in Condensed Matter Physics (1991)

  2. No Access

    Article

    2p X-ray absorption of titanium in minerals

    Ti 2p X-ray absorption spectra for a series of minerals have been measured. Crystal field multiplet calculations can explain the spectral shape. The asymmetry of the e g , peak ...

    F. M. F. de Groot, M. O. Figueiredo, M. J. Basto… in Physics and Chemistry of Minerals (1992)

  3. No Access

    Chapter and Conference Paper

    Magnetic properties of CoO nanoparticles

    The magnetic circular X-ray dichroism (MCXD) of CoO nanoparticies was measured at low temperatures and in high magnetic fields. The particles show a superparamagnetic behaviour at room temperature, and a large...

    C. F. J. Flipse, C. B. Rouwelaar, F. M. F. de Groot in The European Physical Journal D (1999)

  4. No Access

    Article

    Magnetic properties of CoO nanoparticles

    The magnetic circular X-ray dichroism (MCXD) of CoO nanoparticles was measured at low temperatures and in high magnetic fields. The particles show a superparamagnetic behaviour at room temperature, and a large...

    C.F.J. Flipse, C.B. Rouwelaar… in The European Physical Journal D - Atomic, … (1999)

  5. No Access

    Article

    Site-selective XAFS: a new tool for catalysis research

    Site-selective X-ray absorption fine structure (XAFS) experiments will become an important tool in the study of active sites and metal–support interactions in catalysis. Site-selective XAFS is possible with th...

    F.M.F. de Groot in Topics in Catalysis (2000)

  6. No Access

    Article

    The structure of vanadium oxide species on γ-alumina; an in situ X-ray absorption study during catalytic oxidation

    The mechanism of catalytic oxidation reactions was studied using in situ X-ray absorption spectroscopy (XAFS) over a 17.5 wt% V2O5/Al2O3 catalyst, i.e., at reaction temperatures and in the presence of reactants. ...

    M. Ruitenbeek, A.J. van Dillen, F.M.F. de Groot, I.E. Wachs… in Topics in Catalysis (2000)

  7. No Access

    Article

    The electronic structure of the doped one-dimensional transition metal oxide Y 2 - x Ca x BaNiO 5 studied using X-ray absorption

    A strong anisotropic distribution of the holes in Ni 3 d and O 2 p orbitals is observed in the polarization dependent O 1 s and Ni 2 p 3/2 X-ray absorption spectroscopy of the ...

    Z. Hu, M. Knupfer, M. Kielwein, U.K. Rößler… in The European Physical Journal B - Condense… (2002)

  8. No Access

    Article

    Orbital-specific map** of the ligand exchange dynamics of Fe(CO)5 in solution

    Transition-metal complexes have long attracted interest for fundamental chemical reactivity studies and possible use in solar energy conversion1,2. Electronic excitation, ligand loss from the metal centre, or a c...

    Ph. Wernet, K. Kunnus, I. Josefsson, I. Rajkovic, W. Quevedo, M. Beye, S. Schreck… in Nature (2015)

  9. Article

    Open Access

    Jahn-Teller distortion driven magnetic polarons in magnetite

    The first known magnetic mineral, magnetite, has unusual properties, which have fascinated mankind for centuries; it undergoes the Verwey transition around 120 K with an abrupt change in structure and electric...

    H. Y. Huang, Z. Y. Chen, R. -P. Wang, F. M. F. de Groot, W. B. Wu… in Nature Communications (2017)

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