Possible gapless spin-liquid state in the Fe-based halide perovskite Cs4BiFeBr10 derived from the antiferromagnet CsFeBr4

Jie Pan; Yaru Zhang; Yixin Liu; Xin Mi; Fuyang Liu; Yuqiang Fang; Binbin Zhou; Peizhi Yang; Gang Mu; Peng Qin; Fuqiang Huang

doi:10.1039/D4TC05511J

Possible gapless spin-liquid state in the Fe-based halide perovskite Cs₄BiFeBr₁₀ derived from the antiferromagnet CsFeBr₄†

Jie Pan,^a Yaru Zhang,^be Yixin Liu,^d Xin Mi,^be Fuyang Liu,^h Yuqiang Fang,^b Binbin Zhou,^f Peizhi Yang,^g Gang Mu,

*^d Peng Qin

*^be and Fuqiang Huang

*^c

Author affiliations

* Corresponding authors

^a School of Flexible Electronics (Future Technologies), Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 211816 Nanjing, China

^b State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050 Shanghai, China
E-mail: qinpeng@mail.sic.ac.cn

^c State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, 200240 Shanghai, China
E-mail: huangfq@sjtu.edu.cn

^d National Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
E-mail: mugang@mail.sim.ac.cn

^e Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

^f Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology Chinese Academy of Sciences, Shenzhen 518055, China

^g Key Laboratory of Renewable Energy Advanced Materials and Manufacturing Technology, Ministry of Education, Yunnan Normal University, Kunming, Yunnan, China

^h Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, China

Abstract

Recently, magnetic halide perovskites have gained considerable attention due to their potential applications in spintronics. Iron-based halide perovskites are a type of intrinsic magnetic material with robust long-range antiferromagnetic (AFM) ordering, which is a potential parent compound for achieving the spin-liquid state. Herein, we reported the magnetic properties of S = 5/2 spin systems CsFeBr₄ and Cs₄BiFeBr₁₀, both of which possess similar nonbonding Fe–Fe zigzag chains along the b direction. By contrast, compared to CsFeBr₄, the insertion of [BiBr₆] octahedra between Fe–Fe zigzag chains induced changes in the distance and angles of neighbor [FeBr₄] tetrahedra in Cs₄BiFeBr₁₀. Magnetic and specific heat measurements showed the presence of robust long-range AFM ordering in CsFeBr₄ single crystals, while no anomalies indicative of long-range magnetic ordering were found in Cs₄BiFeBr₁₀ single crystals. Competition between two main magnetic exchange pathways, J₁ and J₂, induced magnetic frustration in Cs₄BiFeBr₁₀ with the possible gapless spin-liquid state under low temperatures.

Journal of Materials Chemistry C

Possible gapless spin-liquid state in the Fe-based halide perovskite Cs₄BiFeBr₁₀ derived from the antiferromagnet CsFeBr₄†

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Possible gapless spin-liquid state in the Fe-based halide perovskite Cs₄BiFeBr₁₀ derived from the antiferromagnet CsFeBr₄

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Journal of Materials Chemistry C