Volume 87, Number 2, July 2009
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||29 July 2009|
Calculated magnetic X-ray circular dichroism of half-metal CrO2
Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-ULP 23 rue du Loess, 67034 Strasbourg, France, EU
2 School of Physics and CRANN, Trinity College - Dublin 2, Ireland, EU
Accepted: 2 July 2009
In a non-polar geometry for non-cubic ferromagnetic materials, it is shown that the X-ray absorption dichroism spectrum is composed of a non-magnetic contribution (natural dichroism) emanating from the reduced crystal symmetry and a magnetic contribution from spin-orbit coupling and spin polarization. Their computation at the edges of the half-metal CrO2 chromium site, illustrate the good agreement with experiment. This is found only when both dichroic contributions are taken into account. Moreover, X-ray magnetic dichroism sum rules can be applied directly to extract the spin and orbital magnetic moments only after removing the natural dichroism from the full spectrum.
PACS: 71.15.Ap – Basis sets (LCAO, plane-wave, APW, etc.) and related methodology (scattering methods, ASA, linearized methods, etc.) / 71.20.-b – Electron density of states and band structure of crystalline solids / 71.20.Eh – Rare earth metals and alloys
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.