The Fulleride Polymer Mg5C60

Quintavalle, Dario and Simon, Ferenc and Jánossy, András and Borondics, F. and Baserga, A. and Kamarás, Katalin and Pekker, Sándor (2007) The Fulleride Polymer Mg5C60. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 244. pp. 3853-3856. ISSN 0370-1972

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Abstract

We synthesized a series of MgxC60 samples with nominal composition of x between 1 and 6 via solid state reaction between C 60 and Mg powder. For x = 5 a two dimensional structure was found. The polymer phase is unusually stable up to high temperatures, it remains unchanged at 823 K for 20 minutes as confirmed by ESR. The mid-infrared absorption spectrum suggests that the polymer sheets contain single bonded fulleride ions. Both the spin susceptibility and microwave conductivity measurements show that Mg5C60 is metallic for T > 200 K. The transition from metallic to insulating states around 200 K may be attributed to Anderson localization. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.

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