Galloway Kyle W, Whyte Alexander M, Wernsdorfer Wolfgang, Sanchez-Benitez Javier, Kamenev Konstantin V, Parkin Andrew, Peacock Robert D, Murrie Mark
WestCHEM, Department of Chemistry, University of Glasgow, Glasgow G12 8QQ, UK.
Inorg Chem. 2008 Aug 18;47(16):7438-42. doi: 10.1021/ic800896k. Epub 2008 Jul 16.
An investigation of the magnetic properties of the cobalt(II) citrate cubane [C(NH 2) 3] 8{Co 4(cit) 4}.4H 2O 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).
对柠檬酸钴（II）立方烷[C(NH₂)₃]₈{Co₄(cit)₄}·4H₂O的磁性研究表明，该簇合物是一种新型的钴（II）单分子磁体，其磁化重取向的能垒ΔE/kB = 21 K，τ₀ = 8×10⁻⁷ s。该化合物在交流磁化率的异相（χ''）分量以及磁化强度与磁场的磁滞回线中显示出明显的、频率依赖的峰，这些峰与温度和扫描速率有关。由于磁化强度的非常快速的量子隧穿（QTM），磁滞回线在零场时消失。
