Exchange stiffness in Co$_{2}$-based Heusler compounds

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dc.creatorHamrle, Jaroslav
dc.creatorGaier, Oksana
dc.creatorTrudel, Simon
dc.creatorHillebrands, Burkard
dc.creatorSchneider, Horst
dc.creatorJakob, Gerhard
dc.date2009-04-27
dc.date.accessioned2026-07-07T13:09:00Z
dc.date.available2026-07-07T13:09:00Z
dc.descriptionWe determine the spin wave exchange stiffness $D$ and the exchange constant $A$ for the full Heusler compound \CFS using Brillouin light scattering spectroscopy. We find an extraordinarily large value of $D=715\pm20$ meV Å$^2$ ($A=31.5\pm1.0$ pJ/m) which is, to the best of our knowledge, only surpassed by the intermetallic compound Fe$_{53}$Co$_{47}$ (J. Appl. Phys. \textbf{75}, 7021 (1994)). Furthermore, we provide a systematization of the exchange stiffnesses determined for a variety of Co$_2$-based Heusler compounds. We find that for the investigated compounds, the exchange stiffness is a function of the valence electron concentration and the crystallographic ordering. The exchange stiffness increases when the valence electron concentration and/or the amount of the L2$_1$ ordering increase. A qualitative explanation for the dependence on the valence electron concentration is provided.
dc.identifierhttps://arxiv.org/abs/0904.4194
dc.identifierhttp://arxiv.org/abs/0904.4194
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228600
dc.subjectMaterials Science
dc.subjectOther Condensed Matter
dc.titleExchange stiffness in Co$_{2}$-based Heusler compounds
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