Thin Films of Cobalt(II) Clathrochelate for Molecular Spintronic Devices

Abstract

The possibility of preparing thin films of cobalt(II) cage complex (clathrochelate) that undergoes a temperature-induced spin transition by thermal sublimation was demonstrated using UV spectroscopy. The films were more uniform and more thermally stable than the films formed by centrifugation of the solution on a substrate surface. In combination with scanning electron microscopy data, this revealed the dependence of the spin transition temperature on the method of film preparation and dependence of the supramolecular organization in the films on the substrate material, indicating that transition metal clathrochelates show the spinterface effect at the interface with a metal electrode. In addition to the possibility of controlling the magnetic properties of this unique class of coordination compounds by molecular design methods, this effect opens up broad opportunities for creating molecular spintronic devices with characteristics tailored for the researcher requirements.