Rectangle-like hysteresis in a Dysprosium Metallacrown Magnet with Linear F-Dy-F Anisotropic Moiety

Si-Guo Wu; Ze-Yu Ruan; Jie-Yu Zheng; Guo-Zhang Huang; Veacheslav Vieru; Yan-Cong Chen; Le Tuan Anh Ho; Jun-Liang Liu; Liviu F. Chibotaru; Ming-Liang Tong

arXiv · 2105.09586

Rectangle-like hysteresis in a Dysprosium Metallacrown Magnet with Linear F-Dy-F Anisotropic Moiety

Si-Guo Wu·Ze-Yu Ruan·Jie-Yu Zheng·Guo-Zhang Huang·Veacheslav Vieru·Yan-Cong Chen·Le Tuan Anh Ho·Jun-Liang Liu·Liviu F. Chibotaru·Ming-Liang Tong

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Abstract

Single-molecule magnets (SMMs) exhibiting open hysteresis loops may potentially apply to molecule-based information processing and storage. However, the capacity to retain magnetic memory is always limited by zero-field quantum tunneling of magnetization (QTM). Herein, a well-designed dysprosium metallacrown SMM, consisting of an endohedral approximate linear F-Dy-F strong anisotropic moiety in a peripheral [15-MCNi-5] metallacrown (MC), is reported with the largest reversal barrier of 1060 cm-1 among d-f SMMs. Rectangle-like hysteresis loops are observed with the huge squareness (remanence/saturation magnetization) up to 97% at 2 K. More importantly, zero-field QTM step is phenomenologically removed by minimizing the dipole coupling and hyperfine interactions. The results demonstrate for the first time that zero-field QTM step can be eliminated via manipulating the ligand field and vanishing the external magnetic perturbations, which illuminates a promising blueprint for developing high-performance SMMs.

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Si-Guo Wu, Ze-Yu Ruan, Jie-Yu Zheng, Guo-Zhang Huang, Veacheslav Vieru, Yan-Cong Chen, Le Tuan Anh Ho, Jun-Liang Liu, Liviu F. Chibotaru, Ming-Liang Tong. 2021-05-20. Rectangle-like hysteresis in a Dysprosium Metallacrown Magnet with Linear F-Dy-F Anisotropic Moiety. https://arxiv.org/abs/2105.09586

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