A series of 1D Dy(III) compound showing slow magnetic relaxation: synthesis, structure, and magnetic studies

被引：18

作者：

Zhu, Yan ^{[1
]}

Luo, Feng ^{[1
]}

Song, Yu-mei ^{[1
]}

Huang, Hai-xiao ^{[1
]}

Sun, Gong-ming ^{[1
]}

Tian, Xiao-zhao ^{[1
]}

Yuan, Zi-Zun ^{[1
]}

Liao, Zhen-wei ^{[1
]}

Luo, Ming-biao ^{[1
]}

Liu, Shu-juan ^{[1
]}

Xu, Wen-yuan ^{[1
]}

Feng, Xue-Feng ^{[1
]}

机构：

[1] E China Inst Technol, Coll Biol Chem & Mat Sci, Fuzhou, Jiangxi, Peoples R China

来源：

DALTON TRANSACTIONS | 2012年 / 41卷 / 22期

基金：

中国博士后科学基金;

关键词：

SINGLE-MOLECULE-MAGNET; COORDINATION POLYMERS; CHAIN MAGNETS; GROUND-STATE; ION MAGNET; BEHAVIOR; COMPLEX; ANISOTROPY; EXCHANGE;

D O I：

10.1039/c2dt12313d

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In this work, we present the synthesis, structure, and magnetic studies of three 1D homo-spin Dy(III) compounds in detail. For 1, one crystallography-independent Dy(III) site is contained and the coordination surrounding is a distorted square-antiprism geometry. Within 2, four crystallography-independent Dy(III) sites with largely distorted square-antiprism geometry are observed. As for 3, two crystallography-independent Dy(III) sites showing bicapped triangular-prism geometry are involved. The magnetic studies suggest weak ferromagnetic interactions for 1 and weak antiferromagnetic interactions for 2 and 3. Their dynamic magnetic properties are investigated by means of alternating current (ac) susceptibility measurement, revealing their slow magnetic relaxation. Moreover, a field-dependent ac signal is observed in 1, when by applying a static dc = 1000 Oe field, strong frequency-dependent ac signals and the peak of out-of-phase (chi '') can be clearly found. Ultimately, by fitting the Arrhenius law the energy barrier and relaxation time are estimated.

引用

页码：6749 / 6755

页数：7