Spin waves in FeAlSi system |
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Authors: | L. Dobrzyński K. Blinowski S. Bednarski H. Kȩpa T. Giebułtowicz W. Minor |
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Affiliation: | Institute of Nuclear Research, Laboratory II, 05-400 Otwock-?wierk, Poland;Institute of Experimental Physics, Warsaw University, Ho?;a 69, 00-691 Warszawa, Poland |
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Abstract: | Results of the neutron measurements of magnon dispersion relation in Fe2.937Al0.381Si0.682 (Sendust) alloy are presented. The iron-iron interaction in the FeAlSi system is considered and it is shown that the values of nearest-neighbour exchange integrals in the ordered alloys are linearly dependent on the interatomic distance, the rate of the decrease being about 40 meV/Å. This strongly supports a model of competing ferro- and antiferromagnetic interactions usually assumed for concentrated Fe-Al alloys exhibiting spin-glass behaviour. |
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