Ferromagnetism in LaFeO3/LaNiO3 superlattices with high Curie temperature

Tianlin Zhou, Fei Gao, Qinghua Zhang, Yuansha Chen, Xinzhe Hu, Yuzhou He, Yuchen Zhao, Jianjie Li, Minghang Li, Shaojin Qi, Fengxia Hu, Jirong Sun, Yunzhong Chen () and Baogen Shen
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Tianlin Zhou: Chinese Academy of Sciences
Fei Gao: Chinese Academy of Sciences
Qinghua Zhang: Chinese Academy of Sciences
Yuansha Chen: Chinese Academy of Sciences
Xinzhe Hu: Chinese Academy of Sciences
Yuzhou He: Chinese Academy of Sciences
Yuchen Zhao: Chinese Academy of Sciences
Jianjie Li: Chinese Academy of Sciences
Minghang Li: Chinese Academy of Sciences
Shaojin Qi: Chinese Academy of Sciences
Fengxia Hu: Chinese Academy of Sciences
Jirong Sun: Chinese Academy of Sciences
Yunzhong Chen: Chinese Academy of Sciences
Baogen Shen: Chinese Academy of Sciences

Nature Communications, 2025, vol. 16, issue 1, 1-7

Abstract: Abstract Interfacing complex oxides in atomically engineered layered structures can give rise to a wealth of exceptional electronic and magnetic properties that surpass those of the individual building blocks. Herein, we demonstrate a ferromagnetic spin order with a high Curie temperature of 608 K in superlattices consisting of otherwise paramagnetic perovskite LaNiO3 (LNO) and antiferromagnetic LaFeO3 (LFO). The ferromagnetism likely results from the covalent exchange due to interfacial charge transfer from Fe to Ni cations. By deliberately controlling the thickness of the LNO sublayers thus the amount of charge transfer, a robust ferromagnetism of 4 uB is realized for a stacking periodicity consisting of one single unit cell of both LNO and LFO, an emergent double perovskite phase of La2FeNiO6 with B-site layered ordering configurations. The ferromagnetic LFO/LNO superlattices offer great potential for the search of emergent magnetodielectric and/or multiferroic properties as well as applications in spintronics and electrocatalysts.

Date: 2025
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DOI: 10.1038/s41467-025-58968-z

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