Determination of exchange constants of Heusler compounds by Brillouin light scattering spectroscopy: Application to Co2MnSi

J. Hamrle, O. Gaier, Seong Gi Min, B. Hillebrands, Y. Sakuraba, Y. Ando

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

Brillouin light scattering spectroscopy from so-called standing spin waves in thin magnetic films is often used to determine the magnetic exchange constant. The data analysis of the experimentally determined spin-wave modes requires an unambiguous assignment to the correct spin-wave mode orders. Often additional investigations are needed to guarantee correct assignment. This is particularly important in the case of Heusler compounds where values of the exchange constant vary substantially between different compounds. As a showcase, we report on the determination of the exchange constant (exchange stiffness constant) in Co2MnSi, which is found to be A = 2.35 0.1 νerg cm-1 (D = 575 20 meV2), a value comparable to the value of the exchange constant of Co.

Original languageEnglish
Article number084005
JournalJournal of Physics D: Applied Physics
Volume42
Issue number8
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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