Slow magnetic relaxation in Cu(ii)-Eu(iii) and Cu(ii)-La(iii) complexes

被引：16

作者：

Dolai, Malay ^{[1
]}

Ali, Mahammad ^{[1
]}

Rajnak, Cyril ^{[2
]}

Titis, Jan ^{[2
]}

Boca, Roman ^{[2
]}

机构：

[1] Jadavpur Univ, Dept Chem, Kolkata 700032, India

[2] Univ SS Cyril & Methodius, Dept Chem, Fac Nat Sci, Trnava 91701, Slovakia

来源：

NEW JOURNAL OF CHEMISTRY | 2019年 / 43卷 / 32期

关键词：

SINGLE-MOLECULE MAGNETS; TB-III; CU-II; LN; CO(II); CO; ANISOTROPY; FAMILY; GD; LA;

D O I：

10.1039/c9nj02039j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A dinuclear {Cu-II-Eu-III} complex has been prepared and characterized by single crystal X-ray diffraction, where each metal atom is doubly phenoxido-bridged by the two phenolato oxygen atoms of a hexadentate Schiff-base ligand. The DC magnetic data is consistent with the population of the lowest electronic multiplets of the Eu(iii) atom i.e., ground F-7(0) and thermally accessible F-7(1) (Delta E/hc similar to 300 cm(-1)) tuned by a weak exchange with the Cu(ii) centre that is of an antiferromagnetic nature. The AC susceptibility measurements confirm the presence of field supported slow magnetic relaxation: the relaxation time is tau(LF) (1.9 K) = 25 ms for the low-frequency relaxation channel. Also the isostructural analogue {Cu-II-La-III} shows slow magnetic relaxation, however with different dynamic characteristics.

引用

页码：12698 / 12701

页数：4

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