Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 12: Correlated Electrons: Materials
TT 12.3: Vortrag
Dienstag, 6. September 2022, 10:00–10:15, H22
Thermodynamic Signatures of the Soliton Lattice in Single-Crystal TbFeO3 — •Alexander Engelhardt1, Johanna Jochum2, Andreas Bauer1, Andreas Erb3, Astrid Schneidewind4, and Christian Pfleiderer1 — 1TU München, Garching, Germany — 2Heinz Maier-Leibnitz Zentrum (MLZ), TU München, Garching, Germany — 3Walther-Meißner-Institut, Garching, Germany — 4Forschungszentrum Jülich GmbH, Jülich Center for Neutron Sciences at MLZ, Garching, Germany
The properties of the orthorhombic perovskite TbFeO3 originate from the interplay of a Tb and Fe magnetic sublattices, resulting in a complex magnetic phase diagram. Perhaps most remarkable, at low temperatures, a complex and anharmonic magnetic structure, a so-called magnetic soliton lattice, was identified by means of neutron scattering under magnetic fields up to 4 T [1]. Here, we report the single-crystal growth of TbFeO3 using a combination of a solid-state reactions and optical float-zoning. Measurements of the magnetic ac susceptibility and the specific heat are characteristic of strong easy-plane magnetic anisotropy with two prominent magnetic phase transitions in zero magnetic field at 8 K and 3 K, consistent with the literature. By combining transverse-field ac susceptibility measurements with neutron scattering, we have determined the magnetic phase diagram. When a magnetic field is applied along the hard magnetic c axis, the soliton lattice may be traced up to 12 T, the highest field studied.
[1] S. Artyukhin et al., Nat. Mater. 11, 694 (2012)