Longitudinal spin fluctuations in nickel

P. Böni, J. L. Martínez, J. M. Tranquada

Research output: Contribution to journalArticlepeer-review

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The longitudinal and transverse spin fluctuations in Ni have been measured below Tc by means of polarized neutron scattering in the momentum range 0.06<q<0.18 Å-1. In transverse scans spin-wave peaks at Eq=Dq2 appear as expected from early measurements performed with unpolarized neutrons. The longitudinal magnetic scattering χL(q,E), on the other hand, is quasielastic without any signature of inelastic peaks near Eq. The q and T dependencies of χL(q,E) resemble the paramagnetic scattering above TC, i.e., the linewidth is roughly proportional to q2.5 and the integrated intensity I(q) is proportional to (q22z)-1.

Original languageEnglish
Pages (from-to)5436-5438
Number of pages3
JournalJournal of Applied Physics
Issue number9
StatePublished - 1990
Externally publishedYes


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