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4f hybridization

A P3< 4f hybridization with orbitals pointing toward the centers of charge of the chlorine sp-orbitals corresponds to a vertical drawing. Such a hybridization is possible only for heavy atoms (e.g., K), because it requires high energies. [Pg.81]

The salient result is that the filling of d-electron states is an equally important mechanism for inducing magnetism as the reduction of (ce-4f)-hybridization by volume... [Pg.307]

As noted in the previous sections the evidence for 4f hybridization and involvement in the bonding of the lanthanide elements is strong. If this is the case, then surely there should be other evidence for this in alloys and compounds, but it may be difficult to demonstrate clearly that the observed behavior is indeed due to 4f hybridization with the bonding electrons. [Pg.479]

Fig. 10.17. Schematic picture of a metal with 4f-hybridized conduction-electron wave-functions. Haloes indicate the probability maximum of the radial part of the 4f function at a distance of roughly 0.4 A from the nucleus. The picture probably applies to La metal and Ce at high pressure. Fig. 10.17. Schematic picture of a metal with 4f-hybridized conduction-electron wave-functions. Haloes indicate the probability maximum of the radial part of the 4f function at a distance of roughly 0.4 A from the nucleus. The picture probably applies to La metal and Ce at high pressure.
Probst and Wittig (1977) have observed superconductivity above 37 kbar in the bcc phase of Ba (cf. section 3.4). Tc increases steeply with pressure whereas the melting temperature decreases. This has been ascribed to a considerable 4f hybridization of the conduction electron wave function in the neighborhood of the Fermi level as previously suggested for the high pressure phases of Ba (Wittig, 1973). [Pg.790]

At the present time the electron-spectroscopic manifestations of 4f-hybridization in heavy lanthanide materials are scarce. (The so-called valence fluctuating compounds containing the elements Sm, Eu, Tm or Yb are discarded here (see section 7.3).) Nevertheless, indications for a coupling of the f states with band states have been found in materials where the Eu atoms, according to Mossbauer spectroscopy and the magnetic susceptibility, are in the divalent 4f configuration. The XPS 3d core level spectra of a few systems, like Eu metal, EuAlj, EuCuj, EuAgj (Schneider... [Pg.59]

A theoretical model based on a lattice of highly correlated states (representing 4f) hybridized with a band of conduction states is used to calculate the stability of the antiferromagnetic against the ferromagnetic phase in the presence of a magnetic field, Alascio et al. [25]. [Pg.347]


See other pages where 4f hybridization is mentioned: [Pg.465]    [Pg.460]    [Pg.301]    [Pg.306]    [Pg.311]    [Pg.341]    [Pg.410]    [Pg.437]    [Pg.438]    [Pg.448]    [Pg.450]    [Pg.451]    [Pg.477]    [Pg.478]    [Pg.480]    [Pg.777]    [Pg.1]    [Pg.60]    [Pg.61]    [Pg.98]    [Pg.197]    [Pg.206]    [Pg.274]    [Pg.279]    [Pg.281]    [Pg.322]    [Pg.465]    [Pg.465]    [Pg.154]    [Pg.211]    [Pg.219]   
See also in sourсe #XX -- [ Pg.317 , Pg.341 ]




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4f hybridizing

4f hybridizing

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