A Ferromagnetic Polar Metal With Efficient Electrical Switch of Magnetism
ABSTRACT Materials that host intrinsic coexisting ferromagnetism, polar distortion, and metallicity, a ferromagnetic polar metal (FPM), can combine the advantages of both multiferroics and polar metals, and thus are expected to provide unforeseen opportunities for spintronics with ultra‐low‐power consumption. However, generalizable routes for creating FPMs with strong coupling between itinerant ferromagnetism and polar distortions are still limited. Meanwhile, efficient electrical control of magnetism in such systems remains unexplored. Herein, we introduce a design strategy based on interfacial oxygen‐octahedral‐rotation mismatch to create an intrinsic FPM state in superlattices composed of two nonpolar perovskites, SrRuO 3 and CaTiO 3 . Unlike previous layered oxide systems, which often result in in‐plane polarization, our superlattice FPM exhibits pronounced out‐of‐plane polar displacements directly within the perpendicular ferromagnetic RuO 6 metal network, enabling a strong entanglement between magnetic order and polarity. Consequently, the Rashba spin‐orbit torque in the superlattice FPM gives rise to extraordinary current‐driven magnetization self‐switching at a current density as low as 2.5 × 10 5 A cm −2 , about two orders of magnitude lower than that of conventional heavy‐metal/ferromagnet heterostructures. Our work not only identifies a robust strategy for accessing FPM states but also provides a promising platform for exploring ultra‐low‐power spintronic devices.
Authors
- Zhigao Sheng (ORCID: https://orcid.org/0000-0003-3382-5968)
- Zhen Chen (ORCID: https://orcid.org/0000-0003-3355-3464)
- Fengxia Hu (ORCID: https://orcid.org/0000-0003-0383-0213)
- Jianmin Wu (ORCID: https://orcid.org/0000-0002-0999-9194)
- Yuanchang Li (ORCID: https://orcid.org/0000-0002-1271-7223)
- Nicolas Gauquelin (ORCID: https://orcid.org/0000-0002-5555-7055)
- De Hou (ORCID: https://orcid.org/0000-0003-0457-7491)
- B C Liu
- Yuansha Chen (ORCID: https://orcid.org/0000-0002-7291-5088)
- Yunzhong Chen (ORCID: https://orcid.org/0000-0001-8368-5823)
- Tianlin Zhou
- Haojin Wang (ORCID: https://orcid.org/0009-0006-4582-1680)
- Zhe Yuan (ORCID: https://orcid.org/0000-0002-1898-7857)
- Daming Tian
- Hailong Zhang (ORCID: https://orcid.org/0000-0002-8951-7094)
- Junting Zhang (ORCID: https://orcid.org/0000-0003-3268-9685)
- Yu Xie (ORCID: https://orcid.org/0009-0007-1695-9370)
- Jianjie Li (ORCID: https://orcid.org/0009-0009-6605-4830)
- Zezhong Zhang (ORCID: https://orcid.org/0000-0001-7836-5809)
- B Q Yu
- Zhongqi Deng
- Jiahui Cai
- Huan Lei
- Jirong Sun
- Baogen Shen
- Jing Zhang
- Zhou Wang
- Wenxiao Shi
- Johan Verbeeck
Institutions
- Beijing Institute of Technology (CN)
- University of Antwerp (BE)
- Fudan University (CN)
- China University of Mining and Technology (CN)
- Beijing Institute of Optoelectronic Technology (CN)
- Institute for History of Natural Sciences (CN)
- High Magnetic Field Laboratory (CN)
- Songshan Lake Materials Laboratory (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Jiangxi Academy of Environmental Sciences (CN)
- National Laboratory for Superconductivity (CN)
- University of Chinese Academy of Sciences (CN)
- Ningbo Institute of Industrial Technology (CN)
- Beihang University (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2026-07-23
- DOI
- https://doi.org/10.1002/adma.74269
- Primary Topic
- Multiferroics and related materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00