Objective The finding some polynuclear complexes can behave like magnets on the molecular level attracted much attention, opening perspectives for their applications in processing devices or for high density information storage carriers. To manifest single-molecule magnet (SMM) behaviour a polynuclear complex should have a high-spin ground-state and strong negative anisotropy (D). The energy barrier, U, separating two spin orientations (up-down) is proportional to the product of │D│ and square of spin, S. Therefore the larger the D and S values are the higher the U barriers should be and the longer the magnetization might be blocked. However, such single-molecule magnetization is so far only observed at temperatures too low to allow an application.The project aims to rise the blocking temperature by increasing the U. Our approach is based on heterospin polynuclear complexes assembling involving orbitally-degenerated 4d, 5d metal centres (Os, Ru) and 3d metal ions or/and nitroxide radicals. If the utilisation of the first guaranties the strong anisotropy, the use of the stable radicals as ligands and bridges assures well isolated high spin ground-state owing to the strong exchange interactions between spin carriers. The synthesis work will be complemented with structural analysis and magnetic studies of these systems to elucidate the magnetic interactions as well the magnetic anisotropy in conjunction with theoretical magneto-structural analysis. A major goal of the project is to discover some rules for the rational design of polynuclear cluster systems with elevated blocking temperatures. The project results will document the coordination chemistry of 4d and 5d ions with nitroxides, a field lacking of fundamental results. The complexes will bring experimental opportunity to test and improve theoretical models. The project might be considered as a step toward molecular spintronics. Prototypes of devices could be envisioned if the right property shows up at liquid nitrogen. Fields of science natural sciencesphysical scienceselectromagnetism and electronicsspintronicsmolecular spintronics Programme(s) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Topic(s) FP7-PEOPLE-2011-IIF - Marie Curie Action: "International Incoming Fellowships" Call for proposal FP7-PEOPLE-2011-IIF See other projects for this call Funding Scheme MC-IIFR - International incoming fellowships (Return phase) Coordinator NIKOLAEV INSTITUTE OF INORGANIC CHEMISTRY THE SIBERIAN BRANCH OF THE RUSSIAN ACADEMY OF SCIENCES Address Pr akad lavrentieva 3 630090 Novosibirsk Russia See on map Activity type Research Organisations Administrative Contact Sergey N. Konchenko (Dr.) Links Contact the organisation Opens in new window Website Opens in new window EU contribution No data
