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

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 Cr2O3 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.