Issue 33, 2023

Antiferromagnetic spin-1 large-D phase in organic spin-chain crystals

Abstract

Low-dimensional magnetism, including the Haldane phase and large single ion anisotropy (large-D) phase, has received ongoing attention due to their potential applications in quantum computing and molecular spintronics. However, the lack of materials possessing S = 1 one-dimensional spin-chain with antiferromagnetic intrachain interaction (J) and single ion anisotropy (D) has hindered the investigation and practical implementation of this topic. In this study, iron(II) phthalocyanine (FePc) crystals in β-phase (β-FePc) hosting molecular chains along the b axis are prepared as revealed by X-ray diffraction (XRD). The molecular orientation is found to be almost upright within the naturally cleaved bc plane as determined by synchrotron-based near-edge X-ray absorption fine structure spectroscopy (NEXAFS). β-FePc crystals exhibit clear magnetic anisotropy with the easy plane perpendicular to the b axis, antiferromagnetic intrachain exchange interaction and a large D value. These results demonstrate experimentally that the β-FePc crystal is a new antiferromagnetic spin-1 large-D phase material. This discovery expands the frontiers of low-dimensional magnetism research in organic molecular crystals, providing a new platform to study the topological quantum phase transition in one-dimensional spin chains.

Graphical abstract: Antiferromagnetic spin-1 large-D phase in organic spin-chain crystals

Supplementary files

Article information

Article type
Paper
Submitted
16 Feb 2023
Accepted
19 Jul 2023
First published
20 Jul 2023

J. Mater. Chem. C, 2023,11, 11137-11146

Antiferromagnetic spin-1 large-D phase in organic spin-chain crystals

Z. Li, Y. Wang, Y. Han, M. Song, J. Song, J. Li, Y. Qin, L. Ling, W. Tong, Y. Guo, Z. Du, L. Zhang, W. Zhang, Y. Xiong and L. Cao, J. Mater. Chem. C, 2023, 11, 11137 DOI: 10.1039/D3TC00588G

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