Journal Article

IMPULSE-2022-00312

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Neutron depolarization due to ferromagnetism and spin freezing in CePd$_{1 − x}$Rh$_{x}$

Seifert, M.MLZ* ; Schmakat, P. ; Schulz, M.MLZ* ; Jorba, P. ; Hutanu, V.MLZ* ; Geibel, C. ; Deppe, M. ; Pfleiderer, C. (Corresponding author)MLZ*

2022
APS College Park, MD

Please use a persistent id in citations: doi:10.1103/PhysRevResearch.4.043029

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

Keyword(s): Magnetic Materials (1st) ; Magnetism (2nd)

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Contributing Institute(s):

1. ANTARES (ANTARES)
2. POLI (POLI)
3. METHODS (METHODS)
4. QUANTUM (QUANTUM)

Experiment(s):

1. ANTARES: Cold neutron radiography and tomography station (SR4a)
2. POLI: Polarized hot neutron diffractometer (SR9a)

Appears in the scientific report 2022

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