Coexistence of Magnetic and Electric Orderings in the Metal–Formate Frameworks of [NH<sub>4</sub>][M(HCOO)<sub>3</sub>]
Guan‐Cheng Xu(State Key Laboratory of Rare Earth Materials Chemistry and Application), Wen Zhang(Southeast University), Xiaoming Ma(Beijing National Laboratory for Molecular Sciences), Yihong Chen(State Key Laboratory of Rare Earth Materials Chemistry and Application), Li Zhang(Beijing National Laboratory for Molecular Sciences), Hong‐Ling Cai(Southeast University), Zhe‐Ming Wang(Beijing National Laboratory for Molecular Sciences), Ren‐Gen Xiong(Southeast University), Song Gao(State Key Laboratory of Rare Earth Materials Chemistry and Application)
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Abstract
A family of three-dimensional chiral metal-formate frameworks of [NH(4)][M(HCOO)(3)] (M = Mn, Fe, Co, Ni, and Zn) displays paraelectric to ferroelectric phase transitions between 191 and 254 K, triggered by disorder-order transitions of NH(4)(+) cations and their displacement within the framework channels, combined with spin-canted antiferromagnetic ordering within 8-30 K for the magnetic members, providing a new class of metal-organic frameworks showing the coexistence of magnetic and electric orderings.
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