Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 42: Correlated Electrons: f-Electron Systems and Heavy Fermions 2

TT 42.7: Vortrag

Mittwoch, 18. März 2020, 16:45–17:00, HSZ 204

Metamagnetism in microstructured uranium mononitride — •S. Hamann1,2, D. Gorbunov1, T. Förster1, M. König2, A. V. Andreev3, R. Troć4, and T. Helm1,21Hochfeld-Magnetlabor Dresden (HLD-EMFL), HZDR, Dresden, Germany — 2MPI für Chemische Physik fester Stoffe, Dresden, Germany — 3Institute of Physics, Academy of Sciences, Prague, Czech Republic — 4W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland

As in most 5f compounds, the origin of antiferromagnetism in uranium mononitride (UN) cannot be solely related to either itinerant or local behavior. While inelastic neutron scattering [1] and photoemission measurements [2] as well as bandstructure calculations suggest an itinerant nature, the recently discovered metamagnetic transition at 55 T [3] contradicts this picture. To investigate this spin-flop-like transition with transport measurements, we fabricated microstructures from single-crystalline UN using focussed ion beam technique. The gained resolution allows us to study the temperature and field-dependent Hall effect and longitudinal electrical transport in great detail.

[1] T. M. Holden et al., Phys. Rev. B. 30, 1 (1984)

[2] S. Fujimori et al., Phys. Rev. B. 86, 235108 (2012)

[3] K. Shrestha et al., Scientific Reports 7, 1 (2017)

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