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Issue 12, 2017
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Tm(iii) complexes undergoing slow relaxation of magnetization: exchange coupling and aging effects

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Abstract

The present study focuses on the dynamic magnetic behaviour of exchange coupled 3d–4f complexes containing the scarcely investigated non-Kramers Tm3+ center, the 3d metal ions being either the low-spin Fe3+ (1) or the diamagnetic Co3+ (2) ion. Both complexes display field-induced slow relaxation of magnetization. The field and temperature dependences of the relaxation rate provided indication of relevant contributions from quantum tunnelling, direct, Orbach and Raman processes, with only minor effects from exchange coupling interactions. Furthermore, the aged sample of 2 exhibited an additional relaxation process, possibly due to structural modifications accompanied by solvent loss, highlighting the importance of a careful consideration of this factor when analysing the magnetization dynamics in solvated systems.

Graphical abstract: Tm(iii) complexes undergoing slow relaxation of magnetization: exchange coupling and aging effects

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Supplementary files

Article information


Submitted
12 Dec 2016
Accepted
28 Jan 2017
First published
30 Jan 2017

Dalton Trans., 2017,46, 3848-3856
Article type
Paper

Tm(III) complexes undergoing slow relaxation of magnetization: exchange coupling and aging effects

A. Amjad, A. Figuerola and L. Sorace, Dalton Trans., 2017, 46, 3848
DOI: 10.1039/C6DT04691F

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