SKM 2021 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 9: Poster Session: Correlated Electrons
TT 9.4: Poster
Dienstag, 28. September 2021, 13:30–16:00, P
Magnetic and electronic phases of U2Rh3Si5 — •Jannis Willwater1, Nico Steinki1, Dirk Menzel1, Ricarda Reuter1, Hiroshi Amitsuka2, Vladimír Sechovsky3, Michal Valiska3, Marcelo Jaime4, Franziska Weickert5, and Stefan Süllow1 — 1TU Braunschweig, Braunschweig, Germany — 2Hokkaido University, Sapporo, Japan — 3Charles University, Prague, Czech Republic — 4Los Alamos National Laboratory, Los Alamos, USA — 5Florida State University, Tallahassee, USA
It has been demonstrated that the intermetallic uranium compound U2Rh3Si5 exhibits a unique first-order antiferromagnetic transition accompanied by a structural transition. This was explained with the so-called bootstrapping effect. Here, we present a detailed study of the magnetic and electronic properties of this compound.
Based on the results of magnetization and magnetostriction measurements in high magnetic fields, we establish the complex magnetic phase diagram of U2Rh3Si5 up to 60 T. For the first time, various steps in the high-field magnetization of the a axis have been observed. These effects are probably due to several metamagnetic transitions. In addition, the electrical resistivity exhibits a unique anomaly in a narrow temperature range above the Néel temperature. Since there is no associated signature in the magnetic susceptibility or the structural parameters for all three crystallographic axes, this anomaly in the resistivity cannot be caused by a magnetic, but rather by an electronic phase transition.
[1] J. Willwater et al., Phys. Rev. B 103, 054408 (2021)