Berlin 2018 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 18: f-Electron Systems and Heavy Fermions II
TT 18.8: Talk
Monday, March 12, 2018, 17:00–17:15, H 3005
High magnetic field studies on U2Rh3Si5 — •Nico Steinki1, Stefan Süllow1, Marcelo Jaime2, Franziska Weickert2, Neil Harrison2, Hiroshi Amitsuka3, Michal Vališka4, and Vladimir Sechovsky4 — 1IPKM, TU Braunschweig, Germany — 2NHMFL, LANL, Los Alamos, USA, — 3Hokkaido University, Sapporo, Japan — 4Charles University, Prague, Czech Republic
Together with UO2, the intermetallic U2Rh3Si5 is a prime example of a 5f material exhibiting a first order magnetic phase transition [1-3]. As demonstrated by means of thermodynamic, electronic transport and neutron scattering techniques, this monoclinic system undergoes a structural transition without changing the crystallographic symmetry at TN = 25.6 K. It is accompanied by one into a canted antiferromagnetically ordered state with large magnetic moments (µord ∼ 2.4 µB), together with apparent modifications of the Fermi surface. So far, experiments have been limited to magnetic fields < 30 T, and which has hindered a better understanding of the microscopic mechanism of the phase transition in U2Rh3Si5. Moreover, previous experiments seem to indicate that for B||a axis there is a phase boundary in the range ∼ 40 T. As well, the question about attaining full ferromagnetic polarization along the b axis has not been settled. Hence, in this situation we have performed high field (65 T) magnetization and magnetostriction to map out the magnetic phase diagram.
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