Title: The Mechanism of the Magnetodielectric Response in a Molecule‐Based Trinuclear Iron Cluster Material

Authors: Dong Li, Xuan Wang, Hai-Xia Zhao, Yan-Ping Ren, Gui-Lin Zhuang, La-Sheng Long, Lan-Sun Zheng

Abstract: Magnetodielectric response mechanisms are critical for the rational design and synthesis of molecule‐based magnetodielectric materials. Herein, the magnetodielectric response was investigated in the molecule‐based material [Fe  3  O(CH  3  COO)  6  (py)  3  ](py) (  1  ). Its magnetodielectric coefficient (MD) is ‐2.8% for phase transition III and ‐4.1% for phase transition I. Study of the mechanism of the magnetodielectric response in  1  reveals that its magnetodielectric response at phase transition I is induced by the charge‐frustration of the trinuclear iron cluster, while that at phase transition III is attributed to the spin‐frustration of the trinuclear iron cluster, providing a new route for the design of magnetodielectric materials.

Full-Link: https://onlinelibrary.wiley.com/doi/10.1002/anie.202007813