Yonglong Zhu, Qun Xu
Two-dimensional magnets hold great promise for spintronic applications, and LaAlO₃/SrTiO₃ heterostructures provide an important platform for exploring emergent interfacial magnetic phenomena. A supercritical CO₂-assisted strategy was developed to fabricate 2D LaAlO₃/SrTiO₃ heterostructures, enabling the simultaneous exfoliation of nanosheets, heterostructure assembly, and amorphization of LaAlO₃. The structure, composition, and morphology were characterized by various techniques including Transmission Electron Microscopy (TEM), Atomic Force Microscopy (AFM), X-Ray Diffraction (XRD), X-Ray Photoelectron Spectroscopy (XPS), and Raman spectroscopy, while magnetic properties were measured using a vibrating sample magnetometer at room temperature. Results indicate that CO₂ pressure plays a critical role in controlling lattice expansion, amorphization of LaAlO₃, and formation of interfacial defects, yielding a saturation magnetization that is strongly pressure-dependent, reaching 0.13 emu/g at 300 K under 14 MPa. Enhanced ferromagnetism is primarily attributed to B-site cation defects and Ti₄+ antisite defects, with oxygen vacancies becoming dominant at higher pressures. This supercritical CO₂ route represents a green, efficient, and scalable method for constructing 2D magnetic oxide heterostructures with tunable room-temperature ferromagnetism, thus promoting the development of oxide-based spintronic devices.
@article{11f681ec-9d06-4430-b030-f8ed745de68a,
title={Supercritical CO2 synthesis of LaAlO3 Sr},
author={Yonglong Zhu and Qun Xu},
year={2026},
language={en}
}TY - JOUR TI - Supercritical CO2 synthesis of LaAlO3 Sr AU - Yonglong Zhu AU - Qun Xu PY - 2026 LA - en ER -
This paper addresses the challenge of assessing the feasibility of wind power plant projects at sites with insufficient or no local historic wind data
Important advances in electrochemical engineering technology over the last three decades have fostered the development of a lternative methods to alle
Increasing volumes of waste printed circuit boards from obsolete electronic equipment posed escalating environmental risks and resource losses due to
The leachability tests for manufacturing scrap TV boards (STVB) have indicated the release of metals beyond the limit levels with potential problems f