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Unexpected Supremacy of Non‐Dysprosium Single‐Ion Magnets within a Series of Isomorphic Lanthanide Cyanocobaltate(III) Complexes
Author(s) -
Babeshkin Konstantin A.,
Gavrikov Andrey V.,
Petrosyants Svetlana P.,
Ilyukhin Andrey B.,
Belova Ekaterina V.,
Efimov Nikolay N.
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202000798
Subject(s) - dysprosium , chemistry , lanthanide , crystallography , ion , magnetic relaxation , coordination sphere , magnetization , magnet , anisotropy , relaxation (psychology) , series (stratigraphy) , field (mathematics) , demagnetizing field , inorganic chemistry , magnetic field , crystal structure , social psychology , psychology , physics , paleontology , organic chemistry , quantum mechanics , biology , mathematics , pure mathematics
Slow relaxation of magnetization has been studied for a series of stable isomorphic 3D‐polynuclear Ln‐Co complexes comprising hexadentate [Co(CN) 6 ] 3– linkers, namely {[Ln(H 2 O) 2 ][Co(CN) 6 ] · 2H 2 O} n where Ln = Tb ( 1 ), Dy ( 2 ), Er ( 3 ) and Yb ( 4 ). While 1 and 4 behave as field‐induced single‐ion magnets (SIMs), compounds 2 and 3 undergo rapid demagnetization even under magnetic fields up to 5000 Oe. The effective anisotropic energy barrier of 4 was estimated as 63 K (5000 Oe) which, to the best of our knowledge, is the highest value among Yb‐based SIMs. The obtained data are discussed in scope of the configuration of the Ln environment, i.e. accounting its composition and geometry as well as mutual arrangement of chemically unequal donating centers. Thus, the studied series of complexes represents very rare case when SIM performance of non‐dysprosium complexes far surpasses that of isomorphic Dy derivative.