Banerjee Arnab, Pal Amlan J
Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
Small. 2018 Aug;14(32):e1801510. doi: 10.1002/smll.201801510. Epub 2018 Jul 11.
The formation of all-organic dual spin valves (DSVs) with three organic spin-selective layers, that is, spin-injection, spin-detection, and an additional spin-filtering layer at the intermediate, is reported. As spin-selective layers, manganese- and cobalt phthalocyanines, which are well-known single-molecule magnets, are used in their immobilized forms, so that all-organic DSVs can be prefabricated for characterization. The three spin-selective layers have provided four configurations with at most two spin-flip interfaces enforcing spin-flipping at the two nonmagnetic organic spacer layers, for which copper phthalocyanine is used. Since a couple of the four configurations have exhibited similar resistivities, the degeneracy in the resistive-states is broken through asymmetric spin-injection and spin-detection layers and also through asymmetric thickness of the nonmagnetic spacer layers. When both the spin-flip interfaces are made operative independently, a 2-bit logic with four distinct resistive states can be achieved.
报道了具有三个有机自旋选择层的全有机双自旋阀（DSV）的形成，即在中间层有自旋注入层、自旋检测层和一个额外的自旋过滤层。作为自旋选择层，使用了锰酞菁和钴酞菁，它们是著名的单分子磁体，以固定形式使用，从而可以预制全有机DSV进行表征。这三个自旋选择层提供了四种配置，最多有两个自旋翻转界面，在两个非磁性有机间隔层处强制自旋翻转，其中使用了铜酞菁。由于四种配置中的几种表现出相似的电阻率，因此通过不对称的自旋注入层和自旋检测层以及非磁性间隔层的不对称厚度打破了电阻状态的简并性。当两个自旋翻转界面都独立起作用时，可以实现具有四个不同电阻状态的2位逻辑。
