English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Element-specific magnetic moments and spin-resolved density of states in CoFeMnZ (Z = Al, Ga; Si, Ge)

MPS-Authors
There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Klaer, P., Balke, B., Aljani, V., Winterlik, J., Fecher, G. H., Felser, C., et al. (2011). Element-specific magnetic moments and spin-resolved density of states in CoFeMnZ (Z = Al, Ga; Si, Ge). Physical Review B, 84(14): 144413, pp. 1-7. doi:10.1103/PhysRevB.84.144413.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0018-B548-1
Abstract
Using circular dichroism in x-ray-absorption spectroscopy (XAS/XMCD), we determined element-specific magnetic moments and spin-resolved unoccupied densities of states (DOS) for Co, Fe, and Mn in the quaternary Heusler compounds CoFeMnZ (Z = Al, Ga; Si, Ge). These compounds belong to a class of highly spin-polarized materials with cubic LiMgPdSn-type structure. Different structure models for the sublattice occupation leading to similar average magnetization values can be distinguished by comparison of element-specific moments with theory. We find that the compounds form similar structures, where Co, Fe, Mn, and Z occupy the X, X', Y, and Z sublattice of the related X(2)YZ L2(1)-Heusler structure, for which half-metallic behavior was predicted. The unoccupied partial DOS as derived from the XAS/XMCD spectra for Co, Fe, and Mn are compared to theoretical results. A good agreement is found for Co and Fe, while Mn spectra reveal additional final-state effects (multiplets).