Spin Ice‐like Magnetic Relaxation of a Two‐dimensional Network based on Manganese(III) Salen‐type Single‐Molecule Magnets. (9th September 2020)

• Record Type: Journal Article
• Authors: Kachi‐Terajima, Chihiro; Eiba, Tasuku; Ishii, Rikako; Miyasaka, Hitoshi; Kodama, Yuta; Saito, Toshiaki
• Is Part Of: Angewandte Chemie. Volume 132:Number 49(2020)
• Page Start: 22232
• Page End: 22237
• Publication Date: 2020-09-09
• Subjects: layered compounds -- magnetic properties -- manganese complexes -- single-molecule magnets -- spin ice; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202008914
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: 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 H2 O (saltmen 2− =N, N′‐(1, 1, 2, 2‐tetramethylethylene)bis(salicylideneiminate)). This magnetic system can be considered as a two‐dimensional network of Mn III salen‐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. Abstract : Spin ice‐like magnetic relaxation was found in a two‐dimensional network of Mn III salen‐type single‐molecule magnets with S T =4. The spin ice‐like behavior was a consequence of the competition between the ferromagnetic interaction and local noncollinear magnetic anisotropies on the single‐molecule magnets.