Work

Interplay of pressure and temperature in modulating the magnetic properties of Cr2O3

Year: 2024

Type: article

Abstract: The spin-lattice interaction is pivotal in tailoring materials properties and is crucial for developing novel spintronic devices. In the current work, we aim to explore the effects of pressure and temperature on the magnetic properties of Cr 2 O 3 to gain insights into its spin-lattice interaction. Through high-pressure neutron diffraction experiments, we observed an enhancement of the magnetic Bragg intensity with increasing pressure and it becomes more pronounced as the temperature increases. Results from first-principles calculations reveal a strengthening of the easy-axis magnetic anisotropy, doubling from 0 to 20 GPa. The exchange parameters, calculated based on this spin orientation, show an enhancement of the dominant magnetic interactions and an increase of magnetic ordering temperature when pressure increases. These findings suggest that the contributions from these two mechanisms are responsible for the observed increase in magnetic Bragg intensity. • Enhanced magnetic Bragg intensity observed with increasing pressure in Cr 2 O 3 . • Strengthening of easy-axis magnetic anisotropy as pressure increases. • Néel temperature increases with pressure, as estimated by calculated exchange parameters.

Source: Journal of Alloys and Compounds

DOI: 10.1016/j.jallcom.2024.177202

Authors: Yaokun Su, António M. dos Santos, Jamie J. Molaison, Bianca Haberl, Chen Li

Institutions: University of California, Riverside, Oak Ridge National Laboratory

Language: English

Topic: Advanced Condensed Matter Physics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,550

Funders: U.S. Department of Energy, Office of Science, Basic Energy Sciences, Oak Ridge National Laboratory