Multiple-decker phthalocyaninato Tb(III) single-molecule magnets and Y(III) complexes for next generation devices
Multiple-decker phthalocyaninato Tb(III) single-molecule magnets and Y(III) complexes for next generation devices
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DOI：
10.1016/j.ccr.2011.02.024
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发表时间：
2011-09-01
影响因子：
20.6
通讯作者：
Yamashita, Masahiro
中科院分区：
文献类型：
--
作者：
Katoh, Keiichi;Isshiki, Hironari;Yamashita, Masahiro
报道了Tb-酞菁三层配合物SMMTb-2（obPc）（3）（1）的Ising二聚体的一种新的磁弛豫现象。在Argand图中，在直流磁场中，磁弛豫从单组分系统分裂成两组分系统（温度无关和温度相关的制度）。有明确的证据表明，磁弛豫机制的Tb 3+。二聚体在很大程度上取决于温度和直流磁场。分子结构之间的关系。配位场、基态和SMM在直流磁场中的性质进行了讨论。此外，为了研究配合物在真空蒸发（干燥）过程中的稳定性以及转移到表面后的表面形貌控制，我们使用低温扫描隧道显微镜研究了沉积在Au（1 1 1）表面上的镧系-酞菁三层分子Y2 PC 3。理解和控制具有外场的Ln-Pc多层SMM以及衬底上的单层或多层结构的量子特性对于下一代器件（例如磁信息存储）是重要的。(C)2011 Elsevier B. V.保留所有权利。
A new magnetic relaxation phenomenon for an Ising dimer of a Tb-phthalocyaninato triple-decker SMM Tb-2(obPc)(3) (1) is reported. In Argand plots, the magnetic relaxation splits from a one-component system into a two-component system (temperature-independent and temperature-dependent regimes) in a dc magnetic field. There was clear evidence that the magnetic relaxation mechanisms for the Tb3+. dimer depended heavily on the temperature and the dc magnetic field. The relationships among the molecular structure. ligand field, ground state, and SMM properties in a direct current (dc) magnetic field are discussed. Furthermore, in order to investigate the stability of the complexes in vacuum evaporation (dry) process and the control of their surface morphology after transferring to a surface, we studied the lanthanoid-phthalocyaninato triple-decker molecule Y2PC3 deposited on a Au(1 1 1) surface using a low-temperature scanning tunneling microscope. It is important to both understand and control the quantum properties of Ln-Pc multiple-decker SMMs with an external field and the monolayer or multi-layer structures on a substrate for next generation devices, such as magnetic information storage. (C) 2011 Elsevier B.V. All rights reserved.