Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Electronic Resource  (4)
  • 1985-1989  (4)
Material
  • Electronic Resource  (4)
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 1661-1665 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Spin-dependent absorption spectroscopy with circularly polarized synchrotron radiation is presented as a new method to study magnetism in magnetic solids. In the near-edge absorption region, the spin-dependent absorption coefficient probes the spin density of unoccupied states of selected angular momentum at the absorber atom. The spin-dependent absorption effects as function of temperature contain information on the local magnetic coupling. A large spin-dependent part of the absorption of ∼+0.22 at the Pt L2 edges in PtFe is observed in transmission and fluorescence mode.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The spin-dependent absorption of circularly polarized x-rays is studied at theL-edges of ferromagnetic Gd and Tb metal. At theL 1-edge a spin-dependent part of the absorption coefficient of 10−3–10−2 is observed. Strong resonance absorption known as “white line” occurs at theL 2- andL 3-absorption onset. Correlated with it one finds large spin-dependent absorption effects with amplitudes of a few percent. The spin-dependent absorption spectra reflect the profiles of the spin densities of the states populated in the absorption process. Thep-states show spin densities correlated with the first two flat bands above the Fermi level. The spin density of thed-like states is concentrated in the energy range of the white line. In Gd a splitting of ∼(0.5–0.6) eV of the unoccupied 5d spin up and spin down bands is indicated for both spin-orbit partners. In Tb a large dependence of the 5d spin density on the spin-orbit configuration is observed. The experimental results on the spin densities in Gd are compared with band structure calculations for the ferromagnetic ground-state. The theoretical and experimental spin density profiles agree well for thep-states but not for thed-states. The discrepancy concerning thed-states may be attributed to core-hole polarization effects in the absorption process.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 75 (1989), S. 495-500 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Large spin-dependent absorption effects have been observed with circularly polarized photons of energies between 10.8 keV and 13.8 keV at theL 2,3-edges of Os, Ir, Pt, and Au impurities (3 at.%) in iron. The largest value of the spin-dependent absorption coefficient (µ c /µ o ∼+0.22) is found at the PtL 2-edge. From the energy dependence of the spin-dependent absorption at theL 2- andL 3-edges the spin-density profiles of thed 3/2-andd 5/2-projected states populated in the absorption process are derived. Thed 5/2-spin densities deduced from theL 3 spin-dependent absorption spectra agree well with spin-polarized band-structure calculations for the ferromagnetic ground state. A comparison of thed 3/2- andd 5/2-spin densities shows a strong contribution of the spin-orbit effects to the exchange splitting in Os, whereas only small spin-orbit effects are indicated for Ir, Pt and Au impurities.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Meccanica 22 (1987), S. 86-91 
    ISSN: 1572-9648
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Summary The Laplace Integral Transform is used to construct the displacements, solution for steady-state vibrations of an inhomogeneous elastic rod made up of n, (n≥2) homogeneous elastic segments of the same cross section. The method consists in determining the displacements function of the inhomogeneous rod for zero initial conditions and for displacements type superimposed boundary conditions, with the residues calculated for the poles of the Laplace images of the ends boundary conditions. The correctitude of the constructed solution is then proved and several examples are given to illustrate the method (harmonic end excitations are included).
    Notes: Sommario Si usa la trasformata integrale di Laplace per costruire gli spostamenti soluzione del problema delle vibrazioni stazionarie di una barra elastica non omogenea fatta di n, (n≥2) segmenti elastici omogenei di uguale sezione. Il metodo consiste nel determinare la funzione per gli spostamenti della barra non omogenea in corrispondenza di condizioni iniziali nulle e per sovrapposte condizioni al contorno del tipo spostamento, coi residui calcolati per i poli delle immagini di Laplace delle condizioni al contorno agli estremi. Si dimostra poi la correttezza della soluzione costruita e si danno diversi esempi per illustrare il metodo (comprese le armoniche e le eccitazioni).
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...