Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 35: Poster 2

MA 35.43: Poster

Donnerstag, 8. September 2022, 16:00–18:00, P4

High-pressure crystal growth and the magnetic phase diagram of hexagonal GdInO₃ — •Ning Yuan, Ahmed Elghandour, Lukas Gries, Waldemar Hergett, and Rüdiger Klingeler — Kirchhoff Institute for Physics, Heidelberg University, Germany

GdInO₃ is hexagonal structured system which exhibits strong geometrical frustration and improper geometric ferroelectricity [1,2]. We report the growth of macroscopic GdInO₃ single crystals which are used to study magnetization, specific heat, and thermal expansion in magnetic field up to 16 T. The data are used to construct the magnetic phase diagram. Anomalies in the specific heat confirm the evolution of long-range magnetic order at T_N=2.1 K. At the antiferromagnetic phase boundary, anomalies in thermal expansion and magnetostriction imply significant spin-lattice coupling. A modest net magnetic moment points along the crystallographic c axis in the ground state. The magnetic phase diagrams for B∥c and B∥ab are presented for temperatures down to 400 mK and magnetic fields up to 14 T. Isothermal magnetization curves indicate a narrow 1/3 magnetization plateau as well as a sharp anomaly at about 5 T.

[1] Y. Li et al., J. Mater. Chem. C 6, 7024 (2018).

[2] X. Q. Yin et al., Phys. Rev. B 104, 134432 (2021).