发表机构
Sungkyunkwan University; Korea Institute of Energy Technology; Pusan National University; Max Planck POSTECH Korea Research Initiative; Oak Ridge National Laboratory; Kangwon National University; SLAC National Accelerator Laboratory; Pohang University of Science and Technology（成均馆大学; 韩国能源技术研究院; 釜山国立大学; 马普-POSTECH韩国研究倡议; 橡树岭国家实验室; 江原国立大学; 斯坦福直线加速器中心; 浦项科技大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过调控正交铁氧体ErFeO3的薄膜结构，在2 nm厚的外延薄膜中实现300 K下3.7 μB/f.u.的巨磁化增强，证实二维极限下可通过结构调控实现磁有序。
AI 中文摘要
低维磁性体系因在未来电磁应用中具备高可扩展性与能效，已受到广泛关注。然而有限温度下的低维磁性受限于Mermin-Wagner涨落，使其实现极具挑战性。本研究提出对正交铁氧体体系的薄膜结构进行结构调控，以在室温下实现高响应的低维磁性。通过原子级精准厚度控制制备的ErFeO3外延薄膜表明，其300 K下的磁性响应相比体相显著增强；2 nm厚的外延薄膜的磁性响应达到最大值3.7 μB/f.u.。由薄膜几何结构引发的外延应变与表面轨道重构所形成的特征畴结构，被认为是巨磁化增强的微观起源。研究证实，通过对正交铁氧体体系进行刻意的结构调控，可在二维极限下实现磁有序。
英文摘要
Low-dimensional magnetic systems have received significant interest due to their high scalability and energy efficiency for future electromagnetic applications. However, low-dimensional magnetism at finite temperature is subject to Mermin-Wagner fluctuations, which make its realization highly challenging. Here, we propose structural modulation in the thin-film structure of an orthoferrite system to achieve a high low-dimensional magnetic response at room temperature. ErFeO3 epitaxial thin film with atomically precise thickness control demonstrates that the magnetic response at 300 K can be significantly enhanced compared to its bulk counterpart. The magnetic response reaches its maximum value of 3.7 MuB/f.u. for the 2 nm-thick epitaxial film. The characteristic domain structure resulting from epitaxial strain and orbital reconstruction at the surface, both arising from the thin film geometry, has been proposed as the microscopic origin of the giant magnetization enhancement. We show that magnetic ordering can indeed be realized in the 2D limit, with deliberate structural control of orthoferrite systems.
Comments25 pages, 4 figures
