Strong Axiality and Ising Exchange Interaction Suppress Zero-Field Tunneling of Magnetization of an Asymmetric Dy2 Single-Molecule Magnet
Strong Axiality and Ising Exchange Interaction Suppress Zero-Field Tunneling of Magnetization of an Asymmetric Dy2 Single-Molecule Magnet
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DOI：
10.1021/ja205035g
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发表时间：
2011-08-10
影响因子：
15
通讯作者：
Powell, Annie K.
中科院分区：
文献类型：
--
作者：
Guo, Yun-Nan;Xu, Gong-Feng;Powell, Annie K.
高轴性和伊辛交换相互作用有效地抑制量子隧穿的非对称双核Dy-III配合物的磁化强度，所揭示的实验和理论研究相结合。两个不同的制度的磁化堵塞，一个起源于在个别Dy网站和其他由于网站之间的交换相互作用的堵塞，被分离的第一次。后者的贡献被认为是至关重要的，允许3个数量级的弛豫时间的增加。
The high axiality and Ising exchange interaction efficiently suppress quantum tunneling of magnetization of an asymmetric dinuclear Dy-III complex, as revealed by combined experimental and theoretical investigations. Two distinct regimes of blockage of magnetization, one originating from the blockage at individual Dy sites and the other due to the exchange interaction between the sites, are separated for the first time. The latter contribution is found to be crucial, allowing an increase of the relaxation time by 3 orders of magnitude.