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Issue 13, 2020
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Slow magnetic dynamics in centrosymmetric didysprosium and equilateral triangular tridysprosium molecules

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Abstract

Single-molecule magnets (SMMs) with higher nuclearity provide opportunity for understanding the inherent nature of magnetic dynamics that are not limited to mononuclear SMMs. Herein, centrosymmetric [Dy2(L)2(9-AC)4(MeOH)2]·2CH2Cl2·2H2O (1, where 9-AC = anthracene-9-carboxylate) and equilateral triangular [Dy3(OH)(OMe)(L)3(dbm)3](OH)·3CH2Cl2·7H2O (2, where dbm = dibenzoylmethane anion) were isolated using the Schiff-base ligand 4-(anthracen-9-yl)-2-((quinolin-8-ylimino)methyl)phenol (HL). Static and dynamic magnetic measurements reveal that 1 and 2 display slow magnetic relaxation under zero and applied dc field, respectively. The magnetization relaxation for 1 is dominated by a Raman process due to its non-negligible transverse anisotropy. Complex 2 exhibits field-induced SMM behavior with a reversal barrier of 56 cm−1. By means of ab initio calculations and magnetic measurements, the multiple relaxation regime in 2 was investigated. We suggest that Orbach and Raman mechanisms dominate in the high/low temperature domains, respectively.

Graphical abstract: Slow magnetic dynamics in centrosymmetric didysprosium and equilateral triangular tridysprosium molecules

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Supplementary files

Article information


Submitted
10 Feb 2020
Accepted
24 Feb 2020
First published
25 Feb 2020

Dalton Trans., 2020,49, 4164-4171
Article type
Paper

Slow magnetic dynamics in centrosymmetric didysprosium and equilateral triangular tridysprosium molecules

S. Wu, C. Zhan, G. Huang, Z. Ruan, J. Liu and M. Tong, Dalton Trans., 2020, 49, 4164
DOI: 10.1039/D0DT00481B

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