Cobalt(II) citrate cubane single-molecule magnet

被引：118
作者：
Galloway, Kyle W. [1 ]
Whyte, Alexander M. [1 ]
Wernsdorfer, Wolfgang [2 ,3 ]
Sanchez-Benitez, Javier [4 ,5 ]
Kamenev, Konstantin V. [4 ,5 ]
Parkin, Andrew [1 ]
Peacock, Robert D. [1 ]
Murrie, Mark [1 ]
机构：
[1] Univ Glasgow, Dept Chem, WestCHEM, Glasgow G12 8QQ, Lanark, Scotland
[2] CNRS, Inst Neel, F-38042 Grenoble 9, France
[3] Univ Grenoble 1, F-38042 Grenoble 9, France
[4] Univ Edinburgh, Sch Engn & Elect, Edinburgh EH9 3JJ, Midlothian, Scotland
[5] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3JJ, Midlothian, Scotland
来源：
INORGANIC CHEMISTRY | 2008年 / 47卷 / 16期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1021/ic800896k
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
An investigation of the magnetic properties of the cobalt(II) citrate cubane [C(NH2)(3)](8){Co-4(cit)(4))center dot 4H(2)O reveals that the cluster is a new cobalt(II) single-molecule magnet, with an energy barrier to reorientation of the magnetization, Delta E/k(B) = 21 K, and tau(0) = 8 x 10(-7) s. The compound displays distinct, frequency-dependent peaks in the out-of-phase (chi '') component of the ac magnetic susceptibility and magnetization versus field hysteresis loops that are temperature and sweep rate dependent. The hysteresis loops collapse at zero field due to very fast quantum tunneling of the magnetization (QTM).
引用
收藏
页码：7438 / 7442
页数：5
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