Neutron depolarization due to ferromagnetism and spin freezing in CePd1-xRhx

M. Seifert, P. Schmakat, M. Schulz, P. Jorba, V. Hutanu, C. Geibel, M. Deppe, C. Pfleiderer

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Abstract

We report neutron depolarization measurements of the suppression of long-range ferromagnetism and the concomitant emergence of magnetic irreversibilities and spin freezing in CePd1-xRhx around x∗≈0.6. Tracking the temperature versus field history of the neutron depolarization, we find clear signatures of long-range Ising ferromagnetism below a Curie temperature TC for x=0.4 and a spin freezing of ferromagnetic clusters below a freezing temperature TF1 for x>x∗. Under zero-field-cooling/field-heating and for x>x∗ a reentrant temperature dependence of the neutron depolarization between TF2<TF1 and TF1 is microscopically consistent with a thermally activated growth of the cluster size. The evolution of the depolarization as well as the reentrant temperature dependence as a function of Rh content are consistent with the formation of a Kondo cluster glass below TF1 adjacent to a ferromagnetic quantum phase transition at x∗.

Original languageEnglish
Article number043029
JournalPhysical Review Research
Volume4
Issue number4
DOIs
StatePublished - Oct 2022

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