Symmetry-Mismatch-Induced Ferromagnetism in the Interfacial Layers of CaRuO3/SrTiO3 Superlattices

Shi, Wenxiao1,2,3; Zhang, Jine4; Chen, Xiaobing1,2,5,6; Zhang, Qinghua1,2,3; Zhan, Xiaozhi2,7; Li, Zhe1,2,3; Zheng, Jie1,2,3; Wang, Mengqin1,2,3; Han, Furong4; Zhang, Hui4; Gu, Lin1,2,3; Zhu, Tao1,2,7; Liu, Banggui1,2,3; Chen, Yunzhong1,2,3; Hu, Fengxia1,2,3; Shen, Baogen1,2,3,8; Chen, Yuansha1,2,3,9; Sun, Jirong1,2,3,10,11

2023-04-01

10.1002/adfm.202300338

ADVANCED FUNCTIONAL MATERIALS   Impact Factor & Quartile

1616-301X

1616-3028

By modifying the entangled multi-degrees of freedom of transition-metal oxides, interlayer coupling usually produces interfacial phases with unusual functionalities. Herein, a symmetry-mismatch-driven interfacial phase transition from paramagnetic to ferromagnetic state is reported. By constructing superlattices using CaRuO3 and SrTiO3, two oxides with different oxygen octahedron networks, the tilting/rotation of oxygen octahedra near interface is tuned dramatically, causing an angle increase from approximate to 150 degrees to approximate to 165 degrees for the Ru-O-Ru bond. This in turn drives the interfacial layer of CaRuO3, approximate to 3 unit cells in thickness, from paramagnetic into ferromagnetic state. The ferromagnetic order is robust, showing the highest Curie temperature of approximate to 120 K and the largest saturation magnetization of approximate to 0.7 mu(B) per formula unit. Density functional theory calculations show that the reduced tilting/rotation of RuO6 octahedra favors an itinerant ferromagnetic ground state. This work demonstrates an effective phase tuning by coupled octahedral rotations, offering a new approach to explore emergent materials with desired functionalities.

CaRuO3 itinerant ferromagnetism oxygen octahedra tilting superlattices

SCI

English

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Science Center of the National Science Foundation of China[52088101] ; National Basic Research of China["2022YFA1403302","2018YFA0305704","2019YFA0704904"] ; Project for Innovative Research Team of National Natural Science Foundation of China[11921004] ; National Natural Science Foundation of China["11934016","51972335","12274443","12004022"] ; Chinese Academy of Sciences[XDB33030200]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000963768100001

WILEY-V C H VERLAG GMBH

MATERIALS SCIENCE

Web of Science

1.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
4.Beihang Univ, Sch Integrated Circuit Sci & Engn, Beijing 100191, Peoples R China
5.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn SIQSE, Shenzhen 518055, Peoples R China
6.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
7.Spallat Neutron Source Sci Ctr, Dongguan 523803, Guangdong, Peoples R China
8.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China
9.Chinese Acad Sci, Fujian Innovat Acad, Fuzhou 350108, Fujian, Peoples R China
10.Univ Jinan, Spintron Inst, Jinan 250022, Shandong, Peoples R China
11.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China

Shi, Wenxiao,Zhang, Jine,Chen, Xiaobing,et al. Symmetry-Mismatch-Induced Ferromagnetism in the Interfacial Layers of CaRuO3/SrTiO3 Superlattices[J]. ADVANCED FUNCTIONAL MATERIALS,2023.

Shi, Wenxiao.,Zhang, Jine.,Chen, Xiaobing.,Zhang, Qinghua.,Zhan, Xiaozhi.,...&Sun, Jirong.(2023).Symmetry-Mismatch-Induced Ferromagnetism in the Interfacial Layers of CaRuO3/SrTiO3 Superlattices.ADVANCED FUNCTIONAL MATERIALS.

Shi, Wenxiao,et al."Symmetry-Mismatch-Induced Ferromagnetism in the Interfacial Layers of CaRuO3/SrTiO3 Superlattices".ADVANCED FUNCTIONAL MATERIALS (2023).