Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 94: Correlated Magnetism – Low-Dimensional Systems
TT 94.5: Vortrag
Freitag, 13. März 2026, 10:30–10:45, HSZ/0101
Spins in Rotation: Probing anisotropy in YbAlO3 — •Lipsa Behera1,2, Javier Landaeta2, Konstantin Semeniuk2, and Elena Hassinger3 — 1Dresden University of Technology, Dresden, Germany — 2Max Planck Institute for Chemical Physics of Solids — 3Karlsruhe Institute of Technology
YbAlO3 is an example of a quasi-one-dimensional S=1/2 spin-chain system with weak Ising-like interchain coupling. It has an interesting phase diagram for H//a with an anti-ferromagnetic order below 0.9 K, a field induced longitudinal spin-density wave phase, and a transverse anti-ferromagnetic state. It enters the field polarized state at 1.15 K. Here we present magnetic AC susceptibility measurements performed under rotation at 25 mK to study how sample misalignment influences the phase diagram and critical fields. We find that rotating towards the c-axis leaves the overall phases unchanged, with only the critical fields shifting to higher values. Rotation towards the b-axis, on the other hand produces some interesting results. A splitting of the susceptibility maxima (corresponding to the transition to the fully polarized state) is observed. This suggests the presence of two independent sublattices. Some critical fields move to lower values indicating more stability in the transverse direction. These results hold the potential to highlight intriguing quasi-1D physics.