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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 Sechovsky41IPKM, 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.
B. Becker et al., Phys. Rev. Lett. 78 (1997) 1347.
T. Takeuchi et al., J.A. Mydosh, Phys. Rev. B 56 (1997) 10778.
R. Feyerherm et al., Phys. Rev. B 56 (1997) 13693.

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