Spin Ice‐like Magnetic Relaxation of a Two‐dimensional Network based on Manganese(III) Salen‐type Single‐Molecule Magnets

Spin Ice‐like Magnetic Relaxation of a Two‐dimensional Network based on Manganese(III) Salen‐type Single‐Molecule Magnets
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基于锰(III) Salen型单分子磁体的二维网络的类自旋冰磁弛豫

DOI:
10.1002/anie.202008914
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发表时间:
2020
期刊:
Angewandte Chemie International Edition
影响因子:
--
通讯作者:
Saito Toshiaki
Saito Toshiaki
中科院分区:
--
文献类型:
--
作者:
Kachi‐Terajima Chihiro;Eiba Tasuku;Ishii Rikako;Miyasaka Hitoshi;Kodama Yuta;Saito Toshiaki

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自旋冰是一种奇特的磁性类型,由块状稀土焦绿石氧化物显示。我们发现了[{Mn(Saltman)}4{Mn(CN)6}](ClO_4)⋅_13 H_2O(Saltmen2−=N,ClO)的自旋冰状磁弛豫这个磁性系统可以看作是一个二维的MnIIIsalen型单分子磁体(SMM)网络,其中每个SMM单元(ST=4)具有两个垂直取向的轴向各向异性,并通过[Mn(CN)6]3−单元(S=1)铁磁连接。结果表明,具有铁磁相互作用和局域非共线磁各向异性竞争的二维SMM网络是一种磁化强度慢弛豫的新型磁系,其驰豫时间呈Davidson-Cole分布。
Spin ice is an exotic type of magnetism displayed by bulk rare‐earth pyrochlore oxides. We discovered a spin ice‐like magnetic relaxation of [{Mn(saltmen)}4{Mn(CN)6}](ClO4)⋅13 H2O (saltmen2−=N,N′‐(1,1,2,2‐tetramethylethylene)bis(salicylideneiminate)). This magnetic system can be considered as a two‐dimensional network of MnIIIsalen‐type single‐molecule magnets (SMMs) in which each SMM unit (ST=4) has two orthogonally oriented axial anisotropies and is connected ferromagnetically through the [Mn(CN)6]3−unit (S=1). This work illustrates that a two‐dimensional SMM network with competition between the ferromagnetic interaction and local noncollinear magnetic anisotropies on SMMs is a new type of magnetic system exhibiting slow relaxation of magnetization with a Davidson‐Cole‐type broad distribution of the relaxation time.
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