Discovery of novel magnetic features in the heavy-electron compound U2Zn17
Abstract
Transverse field μ+ SR-measurements on a single crystal sample of U2Zn17 reveal a strikingly non uniform magnetic behavior. While part (∼30%) of the U-5f moments remain paramagnetic below TN = 9.7 K (at least for external fields ≥0.2 T) another part (∼20%) enters into a complex order below 9.7 K which is associated with huge internal field spreads at the μ+ sites. Above TN this part causes an anisotropic μ+ Knight shift involving direction cosines up to 8th order. Only. the remaining fraction is compatible with the simple AF order suggested by neutron diffraction studies. © 1992.
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