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

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Exchange energies, Curie temperatures and magnons in Heusler compounds

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.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0018-98D9-5 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0018-98DC-0

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Thoene, Jan¹, Author
Chadov, Stanislav¹, Author
Fecher, Gerhard¹, Author
Felser, Claudia², Author
Kübler, Jürgen¹, Author

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1external, ou_persistent22
2External Organizations, ou_persistent22

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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.

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Dates: Date issued: 2009-04-21

Publication Status: Issued

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Identifiers: ISI: 000265248300018
DOI: 10.1088/0022-3727/42/8/084013

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Title: Journal of Physics D: Applied Physics

Source Genre: Journal

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Publ. Info: Bristol, UK : IOP Publishing Ltd.

Pages: - Volume / Issue: 42 (8) Sequence Number: 084013 Start / End Page: 1 - 6 Identifier: ISSN: 0022-3727
CoNE: https://pure.mpg.de/cone/journals/resource/0022-3727