The Hard Ferromagnetism in FePS 3 Induced by Non‐Magnetic Molecular Intercalation

Manipulating the magnetic ground states of 2D magnets is a focal point of recent research efforts. Various methods have demonstrated efficacy in modulating the magnetic properties inherent to van der Waals (vdW) magnetic systems. Herein, the emergence of robust anisotropic ferromagnetism within anti...

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Published in:Advanced Physics Research 2024-11
Main Authors: Ou, Yunbo, Li, Xiaoyin, Kopaczek, Jan, Davis, Austin, Jackson, Gigi, Sayyad, Mohammed, Liu, Feng, Tongay, Seth Ariel
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Kopaczek, Jan
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Liu, Feng
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description Manipulating the magnetic ground states of 2D magnets is a focal point of recent research efforts. Various methods have demonstrated efficacy in modulating the magnetic properties inherent to van der Waals (vdW) magnetic systems. Herein, the emergence of robust anisotropic ferromagnetism within antiferromagnetic FePS 3 is unveiled via intercalation with non‐magnetic pyridinium ions. A one‐step ion exchange reaction facilitates the formation of energetically favorable B‐phase and metastable P‐phase. Notably, both B‐ and P‐phases manifest hard ferromagnetic behavior, featuring substantial unsaturated coercive fields (>7 T) and high Curie temperatures (72–87 K). First‐principles calculations elucidate the pivotal role of electron transfer from pyridinium ions to FePS 3 in engineering magnetic exchange interactions. Calculated effective spin Hamiltonian corroborates the observed hard ferromagnetism in intercalated FePS 3 . This study offers crucial insights into hard magnetism in intercalated vdW materials, thereby presenting promising avenues for 2D vdW magnet‐based magnetic devices.
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title The Hard Ferromagnetism in FePS 3 Induced by Non‐Magnetic Molecular Intercalation
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