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

Yaokun Su; António M. dos Santos; Jamie J. Molaison; Bianca Haberl; Chen Li

doi:10.1016/j.jallcom.2024.177202

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

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

Research output: Contribution to journal › Article › peer-review

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 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.

Original language	English
Article number	177202
Journal	Journal of Alloys and Compounds
Volume	1010
DOIs	https://doi.org/10.1016/j.jallcom.2024.177202
State	Published - Jan 5 2025

Funding

This material is based on work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Neutron Scattering Program under Award Number DE-SC0023874. The neutron scattering portion of this research used resources at the Spallation Neutron Source, which is a DOE Office of Science User Facilities operated by the Oak Ridge National Laboratory.

Funders	Funder number
U.S. Department of Energy
Office of Science
Oak Ridge National Laboratory
Basic Energy Sciences	DE-SC0023874
Basic Energy Sciences

Keywords

Cr2O3
First-principles calculation
High pressure
Neutron diffraction
Spin-lattice interaction

Access to Document

10.1016/j.jallcom.2024.177202

Cite this

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title = "Interplay of pressure and temperature in modulating the magnetic properties of Cr2O3",

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 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.",

keywords = "Cr2O3, First-principles calculation, High pressure, Neutron diffraction, Spin-lattice interaction",

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AB - 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.

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