High-temperature ferrimagnetic order triggered metal-to-insulator transition in CaCu3Ni2Os2O12

Xubin Ye, Yunyu Yin, Yingying Cao, Zhiyu Liao, Xiao Wang, Min Liu, Qianqian Wang, Zhao Pan, Zhiwei Hu, Hong-Ji Lin, Chien Te Chen, Chih-Wen Pao, Philippe Ohresser, Lucie Nataf, François Baudelet, Wenyun Yang, Jinbo Yang, Jinguang Cheng, Pu Yu, Xianggang Qiu, Yi-feng Yang (), Tao Xiang and Youwen Long ()
Additional contact information
Xubin Ye: Chinese Academy of Sciences
Yunyu Yin: Chinese Academy of Sciences
Yingying Cao: Chinese Academy of Sciences
Zhiyu Liao: Chinese Academy of Sciences
Xiao Wang: Chinese Academy of Sciences
Min Liu: Chinese Academy of Sciences
Qianqian Wang: Chinese Academy of Sciences
Zhao Pan: Chinese Academy of Sciences
Zhiwei Hu: Max Planck Institute for Chemical Physics of Solids
Hong-Ji Lin: National Synchrotron Radiation Research Center
Chien Te Chen: National Synchrotron Radiation Research Center
Chih-Wen Pao: National Synchrotron Radiation Research Center
Philippe Ohresser: L’Orme des Merisiers
Lucie Nataf: L’Orme des Merisiers
François Baudelet: L’Orme des Merisiers
Wenyun Yang: Peking University
Jinbo Yang: Peking University
Jinguang Cheng: Chinese Academy of Sciences
Pu Yu: Tsinghua University
Xianggang Qiu: Chinese Academy of Sciences
Yi-feng Yang: Chinese Academy of Sciences
Tao Xiang: Chinese Academy of Sciences
Youwen Long: Chinese Academy of Sciences

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract Ferromagnetic order-induced insulator-to-metal transitions via the double exchange mechanism have been studied widely. In contrast, ferromagnetic or ferrimagnetic spontaneous magnetization induced metal-to-insulator transitions (MITs), especially occurring above room temperature, remain extremely limited, although such magnetoelectric materials hold great potential for low-loss multifunctional electronic and spintronic devices. Here, a novel 3d/5d hybridized quadruple perovskite oxide, CaCu3Ni2Os2O12, was synthesized. It undergoes long-range Cu2+(↑)–Ni2+(↑)–Os6+(↓) ferrimagnetic order with a high Curie temperature of 393 K, maintaining a saturated magnetization of 2.15 μB/f.u. at 300 K. Intriguingly, an MIT is found to occur concurrently at the Curie temperature. Theoretical analyses reveal that the ferrimagnetic spontaneous order significantly renormalizes the electronic band structure, which can be further modified by electronic correlation and spin–orbit coupling effects, leading to the MIT via the Lifshitz-type mechanism. This work thus provides a paradigm material to realize ferrimagnetic spontaneous magnetization induced MIT at a high critical temperature toward advanced applications.

Date: 2025
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DOI: 10.1038/s41467-025-59041-5

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