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Spin Ice‐like Magnetic Relaxation of a Two‐dimensional Network based on Manganese(III) Salen‐type Single‐Molecule Magnets
Author(s) -
KachiTerajima Chihiro,
Eiba Tasuku,
Ishii Rikako,
Miyasaka Hitoshi,
Kodama Yuta,
Saito Toshiaki
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202008914
Subject(s) - manganese , spin ice , magnet , spin (aerodynamics) , molecular magnets , relaxation (psychology) , molecule , condensed matter physics , type (biology) , materials science , chemistry , nuclear magnetic resonance , crystallography , physics , magnetization , geology , magnetic field , metallurgy , quantum mechanics , thermodynamics , organic chemistry , psychology , social psychology , magnetic monopole , paleontology
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 }](ClO 4 )⋅13 H 2 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 (S T =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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