Outstanding T C Enhancement in 5 d– 3 d Y 2 NiIrO 6 by Compression
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| Format: | Artículo Open Access |
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Wiley
2026
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| author | Zheng Deng Yao Zhang Sijia Zhang Jing Song Wanli He Yuanzhe Li Meilin Jin Xiang Li Guanghua Liu Zhen Dong Jingkai Bi Wenmin Li Jianfa Zhao Jun Zhang Yi Peng Luchuan Shi Junling Meng Xiancheng Wang Changqing Jin |
| author_facet | Zheng Deng Yao Zhang Sijia Zhang Jing Song Wanli He Yuanzhe Li Meilin Jin Xiang Li Guanghua Liu Zhen Dong Jingkai Bi Wenmin Li Jianfa Zhao Jun Zhang Yi Peng Luchuan Shi Junling Meng Xiancheng Wang Changqing Jin Zheng Deng Yao Zhang Sijia Zhang Jing Song Wanli He Yuanzhe Li Meilin Jin Xiang Li Guanghua Liu Zhen Dong Jingkai Bi Wenmin Li Jianfa Zhao Jun Zhang Yi Peng Luchuan Shi Junling Meng Xiancheng Wang Changqing Jin |
| collection | Wiley Open Access |
| contents | Outstanding T C Enhancement in 5 d– 3 d Y 2 NiIrO 6 by Compression Zheng Deng Yao Zhang Sijia Zhang Jing Song Wanli He Yuanzhe Li Meilin Jin Xiang Li Guanghua Liu Zhen Dong Jingkai Bi Wenmin Li Jianfa Zhao Jun Zhang Yi Peng Luchuan Shi Junling Meng Xiancheng Wang Changqing Jin Advanced Science ABSTRACT Understanding and predicting the properties of 5 d compounds critically depend on the identification of the superexchange interactions from which their magnetism emerges. The study of pressure effects on double perovskite Y 2 NiIrO 6 (YNIO) provides deep insight toward this goal. At ambient pressure, YNIO is a ferrimagnetic insulator with the Ir 4+ ‐5 d J eff = 1/2 Mott‐insulating state. Under physical pressure up to 17 GPa, the compound exhibits concurrent compression on Ni/Ir─O bond lengths and Ni─O─Ir bond angles, leading to an increase of the Curie temperature from 192 to 243 K. On the contrary, external pressure increases distanced Ir─Ir interaction and in turn induces magnetic frustration in Sr 2 IrO 4 /Sr 3 Ir 2 O 7 due to the extended 5 d orbitals. In YNIO, the rock‐salt ordered Ni─Ir naturally blocks extended superexchange beyond the nearest neighbor, and in turn suppresses such magnetic frustration. Moreover, the orthogonal Ni e g –Ir t 2g pathway in YNIO is robust under lattice distortion, while the superexchange is weakened by bond bending in La 2 NiMnO 6 with a similar half‐filed e g – t 2g configuration. Our findings establish a framework for elucidating the mechanism of 5 d –3 d superexchange and guide bond‐engineered magnetism in iridate‐related systems. 10.1002/advs.75739 http://creativecommons.org/licenses/by/4.0/ |
| doi_str_mv | 10.1002/advs.75739 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_advs_75739 |
| institution | Wiley Open Access |
| license_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| publishDate | 2026 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Outstanding T C Enhancement in 5 d– 3 d Y 2 NiIrO 6 by Compression Zheng Deng Yao Zhang Sijia Zhang Jing Song Wanli He Yuanzhe Li Meilin Jin Xiang Li Guanghua Liu Zhen Dong Jingkai Bi Wenmin Li Jianfa Zhao Jun Zhang Yi Peng Luchuan Shi Junling Meng Xiancheng Wang Changqing Jin Advanced Science Outstanding T C Enhancement in 5 d– 3 d Y 2 NiIrO 6 by Compression Zheng Deng Yao Zhang Sijia Zhang Jing Song Wanli He Yuanzhe Li Meilin Jin Xiang Li Guanghua Liu Zhen Dong Jingkai Bi Wenmin Li Jianfa Zhao Jun Zhang Yi Peng Luchuan Shi Junling Meng Xiancheng Wang Changqing Jin Advanced Science ABSTRACT Understanding and predicting the properties of 5 d compounds critically depend on the identification of the superexchange interactions from which their magnetism emerges. The study of pressure effects on double perovskite Y 2 NiIrO 6 (YNIO) provides deep insight toward this goal. At ambient pressure, YNIO is a ferrimagnetic insulator with the Ir 4+ ‐5 d J eff = 1/2 Mott‐insulating state. Under physical pressure up to 17 GPa, the compound exhibits concurrent compression on Ni/Ir─O bond lengths and Ni─O─Ir bond angles, leading to an increase of the Curie temperature from 192 to 243 K. On the contrary, external pressure increases distanced Ir─Ir interaction and in turn induces magnetic frustration in Sr 2 IrO 4 /Sr 3 Ir 2 O 7 due to the extended 5 d orbitals. In YNIO, the rock‐salt ordered Ni─Ir naturally blocks extended superexchange beyond the nearest neighbor, and in turn suppresses such magnetic frustration. Moreover, the orthogonal Ni e g –Ir t 2g pathway in YNIO is robust under lattice distortion, while the superexchange is weakened by bond bending in La 2 NiMnO 6 with a similar half‐filed e g – t 2g configuration. Our findings establish a framework for elucidating the mechanism of 5 d –3 d superexchange and guide bond‐engineered magnetism in iridate‐related systems. 10.1002/advs.75739 http://creativecommons.org/licenses/by/4.0/ |
| title | Outstanding T C Enhancement in 5 d– 3 d Y 2 NiIrO 6 by Compression |
| topic | Advanced Science |
| url | https://advanced.onlinelibrary.wiley.com/doi/10.1002/advs.75739 |