Giant Magnetization Enhancement at Ultrathin Limit of an Orthoferrite
Abstract
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.
Versions
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BibTeX
@misc{oh2026giant,
title = {{Giant Magnetization Enhancement at Ultrathin Limit of an Orthoferrite}},
author = {Jin Young Oh and Yaolong Xing and Seung Gyo Jeong and Sehwan Song and Woo-suk Noh and Valeria Lauter and Seongjae Choi and Seyoung Kwon and Jaeha Choi and Si Won Kim and Hong Hyun Jeon and Heemin Lee and Cheng-Tai Kuo and Jun-Sik Lee and Chanyoung Lee and Yeonkyu Lee and Jeehoon Kim and Heung-Sik Kim and Sungkyun Park and Sang Ho Oh and Woo Seok Choi},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.11217},
eprint = {2610.11217},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.11217},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Giant Magnetization Enhancement at Ultrathin Limit of an Orthoferrite
AU - Jin Young Oh
AU - Yaolong Xing
AU - Seung Gyo Jeong
AU - Sehwan Song
AU - Woo-suk Noh
AU - Valeria Lauter
AU - Seongjae Choi
AU - Seyoung Kwon
AU - Jaeha Choi
AU - Si Won Kim
AU - Hong Hyun Jeon
AU - Heemin Lee
AU - Cheng-Tai Kuo
AU - Jun-Sik Lee
AU - Chanyoung Lee
AU - Yeonkyu Lee
AU - Jeehoon Kim
AU - Heung-Sik Kim
AU - Sungkyun Park
AU - Sang Ho Oh
AU - Woo Seok Choi
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2610.11217
UR - https://arxiv.org/abs/2610.11217
AB - 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.
ER -