Magnetic compressibility of layered ferromagnet under pressure

Journal Article · 16 March 2025 · Journal of Applied Physics

DOI: https://doi.org/10.1063/5.0253878 · OSTI ID:2530978

Boswell, Matt ; Peng, Cheng ; Bi, Wenli ; Moreira dos Santos, Antonio F. ; Xie, Weiwei

This study systematically investigates the magnetic properties of the layered ferromagnet MnPt5As under pressure through a combination of experimental measurements and theoretical simulations. MnPt5As exhibits a ferromagnetic transition at approximately 301 K. Neutron diffraction measurements under applied pressures up to ∼4.9 GPa were performed over a temperature range from 320 to 100 K to probe its magnetic behavior. The results confirm that the Mn atoms maintain a ferromagnetic order under applied pressures, consistent with the ambient-pressure findings. However, magnetic anisotropy is notably suppressed. To further elucidate the compressibility of magnetic anisotropy in MnPt5As, x-ray diffraction under pressure was conducted. The results reveal that the c-axis undergoes a greater and more rapid compression compared to the ab-plane, which may contribute to the observed suppression of Mn ferromagnetic ordering along the c-axis. Additionally, theoretical calculations indicate that magnetic ordering exhibits a similar pressure-induced trend under applied pressure, supporting the experimental observations. These findings offer insights into the pressure-dependent magnetic properties and anisotropy of MnPt5As, with potential implications for strain engineering in Mn-based magnetic devices.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-06CH11357; SC0023648
• OSTI ID: 2530978
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 137; ISSN 0021-8979
• Publisher: American Institute of PhysicsCopyright Statement
• Country of Publication: United States
• Language: English