ИСТИНА

The majority of single-ion magnets (SIMs) represents organometallic complexes of d- or f-elements as well as strongly anisotropic magnetic ions anchored to the surface or captured inside the fullerens. The approach we develop is based on a different route: we use a solid state apatite compounds as a matrix for such an anisotropic magnetic ions that allows us to construct a novel SIMs. One of the most impressive advantage of the apatite structure together with its thermal and chemical stability is that it is a convenient tool to tune the SIM magnetic properties of imbedded paramagnetic ions. Decrease of paramagnetic ions’ concentration works as diamagnetic dilution and suppress quantum tunneling in the case of transition metal ions. Variation the kind of alkaline earth nonmagnetic cation of phosphate matrix changes the crystal field of paramagnetic ion and could substantially raise the remagnetization energy barrier. This approach allowed us to obtain compounds with SIM properties containing copper, cobalt and dysprosium as paramagnetic atom that are characterized by very high magnetization reversal energy barrier up to 100, 390 and 1040 cm-1 respectively.