Evidence for weak itinerant long-range magnetic correlations in UGe2
A. Yaouanc, P. Dalmas de Reotier, P.C.M. Gubbens, C.T. Kaiser, A.A., Menovsky, M. Mihalik, S.P. Cottrell
TL;DR
This study uses muon spin relaxation to identify weak, itinerant magnetic correlations in UGe2, revealing quasi-static magnetic behavior involving small moments, consistent with the dipolar Heisenberg model.
Contribution
It provides experimental evidence of itinerant magnetic correlations in UGe2, expanding understanding of its magnetic properties beyond localized electron models.
Findings
Detection of quasi-static itinerant magnetic correlations
Correlations involve small magnetic moments
Critical dynamics match the dipolar Heisenberg model
Abstract
Positive muon spin relaxation measurements performed on the ferromagnet UGe2 reveal, in addition to the well known localized 5f-electron density responsible for the bulk magnetic properties, the existence of itinerant quasi-static magnetic correlations. Their critical dynamics is well described by the conventional dipolar Heisenberg model. These correlations involve small magnetic moments.
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