反铁磁性
铁磁性
凝聚态物理
量子
格子(音乐)
基态
自旋(空气动力学)
镍
相变
材料科学
物理
量子力学
热力学
声学
冶金
作者
Pengfei Tan,Chuanhui Zhu,Xiao-Sheng Ni,Han‐Qing Wu,Shuang Zhao,Tao Xia,Jinjin Yang,Tao Han,Mei-Huan Zhao,Yifeng Han,Yuanhua Xia,Zheng Deng,Muwei Wu,Dao‐Xin Yao,Man-Rong Li
出处
期刊:Materials horizons
[The Royal Society of Chemistry]
日期:2024-01-01
摘要
The intricate correlation between lattice geometry, topological behavior and charge degrees of freedom plays a key role in determining the physical and chemical properties of a quantum-magnetic system. Herein, we investigate the introduction of the unusual oxidation state as an alternative pathway to modulate the magnetic ground state in the well-known S = 1 Haldane system nickelate Y2BaNiO5 (YBNO). YBNO is topologically reduced to incorporate d9-Ni+ (S = 1/2) in the one-dimensional Haldane chain system. The random distribution of Ni+ for the first time results in the emergence of a one-dimensional ferromagnetic phase with a transition temperature far above room temperature. Theoretical calculations reveal that the antiferromagnetic interplay can evolve into ferromagnetic interactions with the presence of oxygen vacancies, which promotes the formation of ferromagnetic order within one-dimensional nickel chains. The unusual electronic instabilities in the nickel-based Haldane system may offer new possibilities towards unconventional physical and chemical properties from quantum interactions.
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