Uniaxial Pressure Tuning of Magnetic Phases in PdCrO2

Datum

12.05.2025

Zeit

14:50 - 16:20

Sprecher

Nina Stilkerich

Zugehörigkeit

IFMP, TU Dresden

Serie

TUD Physik-IFMP Institutsseminar

Sprache

en

Hauptthema

Physik

Andere Themen

Physik

Host

D. Peets

Beschreibung

Abstract

Uniaxial pressure can be used to tune the competing interaction energies of frustrated magnets. PdCrO2 is such a frustrated antiferromagnet below a Néel temperature of 37.5 K. A previous study discovered a double-to-single-q transition under a uniaxial compression of –0.4 GPa, and predicts a Néel transition at –1 GPa [1].  In this talk, I present stress-strain measurements as well as XRD and neutron diffraction measurements on PdCrO2 under uniaxial pressure. Thereby, not only the presence of the double-to-single-q transition is confirmed, but a new phase is revealed. The phase is characterized by a 30% increase of the Young’s modulus compared to the unstressed lattice, as well as a change of the magnetic structure. The magnetic structure of the new phase at ≈ –1GPa is, other than predicted, not a Néel-type magnetic order. 

[1] D. Sun et al., New J. Phys. 23, 123050 (2021).

Zoom: 688 4227 2214 (https://tu-dresden.zoom-x.de/j/68842272214?pwd=2nPGt3aESuZVlyhMAyv96TZRxkU9F9.1), Passcode: IFMP2024-5

Links

• Webseite
• Termindetails auf den Webseiten der TU Dresden (https://tu-dresden.de)

Letztmalig verändert: 12.05.2025, 07:39:32