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Superconductivity and spectroscopy of heterofullerides Rb2MC60, K2MC60, and KM2C60 (M = Mg, Be)

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Abstract

A series of new heterofullerides with compositions Rb2MC60, K2MC60, and KM2C60 (M = Mg, Be) have been synthesized. Measurements of the temperature dependences of the magnetic susceptibility in the temperature interval from 4.2 to 300 K reveal a superconducting transition in heterofullerides K2MgC60, KMg2C60, K2BeC60, and Rb2BeC60 at temperatures T c = 13–22 K. The electron states with uncompensated spin are studied by the electron paramagnetic resonance technique. The contributions of conduction electrons and localized electrons to the paramagnetic susceptibility are extracted.

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Authors and Affiliations

  1. Moscow State University, Vorob’evy gory, Moscow, 119992, Russia

    V. G. Kytin, B. M. Bulychev, A. V. Krechetov, E. A. Konstantinova, V. A. Kulbachinskiĭ & R. A. Lunin

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  1. V. G. Kytin
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  2. B. M. Bulychev
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  3. A. V. Krechetov
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  4. E. A. Konstantinova
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  5. V. A. Kulbachinskiĭ
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  6. R. A. Lunin
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Additional information

Original Russian Text © V.G. Kytin, B.M. Bulychev, A.V. Krechetov, E.A. Konstantinova, V.A. Kulbachinskiĭ, R.A. Lunin, 2007, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 132, No. 1, pp. 283–286.

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Kytin, V.G., Bulychev, B.M., Krechetov, A.V. et al. Superconductivity and spectroscopy of heterofullerides Rb2MC60, K2MC60, and KM2C60 (M = Mg, Be). J. Exp. Theor. Phys. 105, 250–252 (2007). https://doi.org/10.1134/S1063776107070552

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  • DOI: https://doi.org/10.1134/S1063776107070552

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