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Issue 29, 2015
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Cu(ii)–Dy(iii) and Co(iii)–Dy(iii) based single molecule magnets with multiple slow magnetic relaxation processes in the Cu(ii)–Dy(iii) complex

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Abstract

Two dinuclear Schiff-base complexes [CuIIDyIII] and [CoIIIDyIII] have been synthesized and structurally characterized. The AC susceptibility measurements taken at BDC = 0.2 T show a slow magnetic relaxation typical for single-molecule magnets. Unusual is the presence of three relaxation branches in [CuIIDyIII]; the slowest (low-frequency) process possesses the barrier to spin reversal of U/kB = 2.8 K and an extrapolated relaxation time as slow as τ0 = 0.11 s. The intermediate-frequency process is typical for SMM of this class with U/kB = 122 K and τ0 = 9.9 × 10−7 s; an onset of the high-frequency process is evidenced and this is the fastest. In contrast, the [CoIIIDyIII] complex free of exchange coupling exhibits only a single relaxation path with SMM parameters U/kB = 113 K and τ0 = 7.0 × 10−9 s.

Graphical abstract: Cu(ii)–Dy(iii) and Co(iii)–Dy(iii) based single molecule magnets with multiple slow magnetic relaxation processes in the Cu(ii)–Dy(iii) complex

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Supplementary files

Article information


Submitted
10 Mar 2015
Accepted
04 Jun 2015
First published
08 Jun 2015

Dalton Trans., 2015,44, 13242-13249
Article type
Paper
Author version available

Cu(II)–Dy(III) and Co(III)–Dy(III) based single molecule magnets with multiple slow magnetic relaxation processes in the Cu(II)–Dy(III) complex

M. Dolai, M. Ali, J. Titiš and R. Boča, Dalton Trans., 2015, 44, 13242
DOI: 10.1039/C5DT00960J

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