Polarized neutron measurement of ''forbidden'' magnon scattering in Pt 3Mn

W. H. Li, C. H. Perry, J. B. Sokoloff, J. W. Lynn, R. M. Nicklow

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Abstract

We have employed inelastic scattering of polarized neutrons to study the nature of the magnetic response in the vicinity of the Curie temperature (T C=493 K) for the intermetallic ferromagnet Pt3Mn. The measurements were taken on the HB-1 triple-axis spectrometer at ORNL, with a field of 10 kOe applied along the scattering vector Q. For 0.9TC <T<1.2TC we observed underdamped magnons not only with the conventional (+) spin-wave polarization but also with the ''forbidden'' (-) polarization, with an intensity difference I(+)-I(-) which is approximately proportional to the magnetization. Both these observations are in agreement with the slowly fluctuating spin-density theory of itinerant ferromagnetism.

Original languageEnglish
Pages (from-to)3751-3752
Number of pages2
JournalJournal of Applied Physics
Volume57
Issue number8
DOIs
StatePublished - 1985

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