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MA: Fachverband Magnetismus
MA 5: Spin Structures and Magnetic Phase Transitions I
MA 5.1: Talk
Monday, March 18, 2024, 09:30–09:45, EB 202
Exploring and Tuning Magnetic Order in Rare-Earth Tritellurides — •Thom Ottenbros1, Claudius Mueller1,2, Shiming Lei3,5, Ratnadwip Shingha4,5, Leslie Schoop5, Nigel Hussey1,6, and Steffen Wiedmann1 — 1HFML-FELIX, Radboud University, Nijmegen, The Netherlands — 2UT, Enschede, The Netherlands — 3HKUST, Hong Kong — 4IITG, Guwahati, India — 5Princeton University, New Jersey, USA — 6HH Wills, Bristol, UK
In recent years, a new class of layered antiferromagnetic (AFM) materials has appeared that consist of alternating stacks of localized, magnetically ordered and itinerant, non-magnetic electrons, giving rise to rich phase diagrams in which spin and charge degrees of freedom play a central role. In the rare-earth tritelluride RTe3 family, this interplay between the spin and charge interactions is particularly complex, with the itinerant 5p Te electrons undergoing a charge density wave transition at elevated temperatures.
In this work, we present thermal expansion (TE) and high-field magnetostriction (MS) studies on GdTe3, the ideal candidate material to investigate the cascade of AFM ordered phases due to the relatively high transition temperatures with a suspected striped AFM spin structure. We present MS data along different high-symmetry orientations and demonstrate that out-of-plane uniaxial strain alters the magnetic phase diagram. Finally, from analysis of the quantum oscillations in the MS, we find evidence for a strain-induced Fermi surface reconstruction. Our results demonstrate the remarkable complexity and tunability of the ordered magnetic states and spin structures in GdTe3.
Keywords: Antiferromagnetism; High Magnetic Field; Dilatometry; Van der Waals layered