Field‐Supported Single‐Molecule Magnets of Type [Co(bzimpy)X2]

Magnetic properties of pentacoordinate complexes of the type [Co(bzimpy)X2], X = Cl and Br, were investigated in DC and AC modes. The DC data shows sizeable zero‐field splitting for these complexes. The AC susceptibility data confirms slow magnetic relaxation at the applied DC field with two relaxat...

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Bibliographic Details
Published in:European journal of inorganic chemistry 2017-04, Vol.2017 (13), p.1915-1922
Main Authors: Rajnák, Cyril, Varga, Filip, Titiš, Ján, Moncoľ, Ján, Boča, Roman
Format: Article
Language:English
Subjects:
Channels
Cobalt
Magnetic fields
Magnetic permeability
Magnetic properties
Magnetic relaxation
Magnets
Pentacoordinate complexes
Relaxation time
Single‐molecule magnets
Splitting
Structure elucidation
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Summary:Magnetic properties of pentacoordinate complexes of the type [Co(bzimpy)X2], X = Cl and Br, were investigated in DC and AC modes. The DC data shows sizeable zero‐field splitting for these complexes. The AC susceptibility data confirms slow magnetic relaxation at the applied DC field with two relaxation channels. The low‐frequency relaxation time is as slow as τLF ≈ 0.1–0.3 s for the Cl and Br complexes at T = 1.9 K. Mononuclear pentacoordinate CoII complexes [Co(bzimpy)Cl2] and [Co(bzimpy)Br2] show a sizeable magnetic anisotropy. They display slow magnetic relaxation through two relaxation channels supported by the external magnetic field. The low‐frequency relaxation time is as slow as 0.1–0.3 s at T = 1.9 K.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.201601279