Superconductivity of heterofullerides AnBmHgxC60 (A=K, Rb, Cs; B=Be, Mg, B, Al, Ga, In; n=1, 2; m=1, 2; x < 1)

The fullerides AnMmC60 (A=K, Rb, Cs; M = Be, Mg; B, Al, Ga. In; n = 1, 2; m = 1, 2) have been synthesized by exchange reactions of alkali metal fullerides with metal chlorides (groups 2 and 13), by method using liquid alloys of metals with mercury (amalgams), and by thermal decomposition of aluminum...

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Bibliographic Details
Published in:Journal of physics. Conference series 2012-12, Vol.391 (1)
Main Authors: Kulbachinskii, V A, Bulychev, B M, Lunin, R A, Kachan, I P
Format: Article
Language:English
Subjects:
Alkali metals
Aluminum hydrides
Amalgams
Beryllium
Cesium
Chemical synthesis
Crystal lattices
Electron paramagnetic resonance
Fullerides
Gallium
Liquid alloys
Magnesium
Metal chlorides
NMR
Nuclear magnetic resonance
Physics
Raman spectra
Resonance scattering
Rubidium
Superconductivity
Superconductors
Thermal decomposition
Transition temperature
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Summary:The fullerides AnMmC60 (A=K, Rb, Cs; M = Be, Mg; B, Al, Ga. In; n = 1, 2; m = 1, 2) have been synthesized by exchange reactions of alkali metal fullerides with metal chlorides (groups 2 and 13), by method using liquid alloys of metals with mercury (amalgams), and by thermal decomposition of aluminum hydride. The samples are studied by X-ray diffraction, nuclear magnetic resonance, electron paramagnetic resonance, Raman scattering, and differential scanning calorimetry. It was found that the fulleride K2GaC60 is superconductor with transition temperature Tc = 22 K that exceeds Tc for K3C60 (19 K). Fullerides with In and B are not supercomductors. The fullerides with composition CsnHgxC60 (n = 2; 3) are not superconductors and crystallize in orthorhombic lattices.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/391/1/012173