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

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Geibel,  C.
Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Deppe,  M.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Seifert, M., Schmakat, P., Schulz, M., Jorba, P., Hutanu, V., Geibel, C., et al. (2022). Neutron depolarization due to ferromagnetism and spin freezing in CePd1-xRhx. Physical Review Research, 4(4): 043029, pp. 1-17. doi:10.1103/PhysRevResearch.4.043029.


Cite as: https://hdl.handle.net/21.11116/0000-000C-392C-4
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∗. © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.