Abstract

Temperature dependences of spin wave energies, the integrated intensity of neutron scattering, as well as the magnetization of a single crystal of Pd 2 MnSn have been measured. The results have been found to be well interpreted in terms of the spin wave theory including magnon-magnon interactions developed for the Heisenberg system. Neutron paramagnetic scattering from the same crystal has also been measured at 300 and 1000 K. The second moment determined from the energy spectra of Gaussian shape is in good agreement with that calculated using the exchange parameters determined by spin wave measurement at 50 K. These results indicate that the Heusler alloy is a typical Heisenberg system with long range interactions.

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