Exchange energies, Curie temperatures and magnons in Heusler compounds

Thoene, Jan; Chadov, Stanislav; Fecher, Gerhard; Felser, Claudia; Kübler, Jürgen

doi:10.1088/0022-3727/42/8/084013

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Exchange energies, Curie temperatures and magnons in Heusler compounds

MPS-Authors

There are no MPG-Authors in the publication available

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Thoene, J., Chadov, S., Fecher, G., Felser, C., & Kübler, J. (2009). Exchange energies, Curie temperatures and magnons in Heusler compounds. Journal of Physics D: Applied Physics, 42(8): 084013, pp. 1-6. doi:10.1088/0022-3727/42/8/084013.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-98D9-5

Abstract

Heisenberg exchange parameters for various Heusler compounds with L2(1) structure were calculated using the Korringa-Kohn-Rostoker method and by employing the magnetic-force theorem to calculate the total energy changes associated with a local rotation of magnetization directions. Random occupation was treated within the coherent potential approximation. Further, the Curie temperatures were calculated in the mean-field approximation and have been found to be in good agreement with the experiment. A procedure for evaluating the spin-stiffness constants for the case of multiple magnetic sublattices is given and the results were compared with measured values. Magnon dispersion curves were obtained by Fourier transforming the calculated exchange parameters.