Multiferroic Behavior Associated with an Order-Disorder Hydrogen Bonding Transition in Metal-Organic Frameworks (MOFs) with the Perovskite ABX3 Architecture
Multiferroic Behavior Associated with an Order-Disorder Hydrogen Bonding Transition in Metal-Organic Frameworks (MOFs) with the Perovskite ABX3 Architecture
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DOI：
10.1021/ja904156s
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发表时间：
2009-09-30
影响因子：
15
通讯作者：
Cheetham, Anthony K.
中科院分区：
文献类型：
--
作者：
Jain, Prashant;Ramachandran, Vasanth;Cheetham, Anthony K.
报道了通式为[（CH_3）（2）NH_2]M（HCOO）（3）的钙钛矿相关金属有机骨架中的多铁性，其中M = Mn，Fe，Co，Ni。所有四种化合物在160-185 K（Mn：185 K，Fe：160 K; Co：165 K; Ni：180 K）的温度范围内均表现出顺电-反铁电相变行为;这与涉及氢键合的二甲基铵阳离子的有序-无序转变有关。进一步冷却后，化合物在40 K以下变成倾斜的弱铁磁体.该研究开辟了一类新的多铁性材料，其中的电有序是通过氢键实现的。
Multiferroic behavior in perovskite-related metal-organic frameworks of general formula [(CH3)(2)NH2]M(HCOO)(3), where M = Mn, Fe, Co, and Ni, is reported. All four compounds exhibit paraelectric-antiferroelectric phase transition behavior in the temperature range 160-185 K (Mn: 185 K, Fe: 160 K; Co: 165 K; Ni: 180 K); this is associated with an order-disorder transition involving the hydrogen bonded dimethylammonium cations. On further cooling, the compounds become canted weak ferromagnets below 40 K. This research opens up a new class of multiferroics in which the electrical ordering is achieved by means of hydrogen bonding.