Low Temperature Physics: 39, 58 (2013); https://doi.org/10.1063/1.4776231 (8 pages)
Fizika Nizkikh Temperatur: Volume 39, Number 1 (January 2013), p. 76-85    ( to contents , go back )

Superconducting properties of new heterofullerides

V.A. Kulbachinskii1, R.A. Lunin1, I.P. Kachan1, Yu.A. Velikodnyi1, V.P. Tarasov2, and B.M. Bulychev1

1M.V. Lomonosov Moscow State University, Moscow 119991, Russia
E-mail: kulb@mig.phys.msu.ru

2Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 119991 Moscow, Russia
pos Анотація:

Received Octouber 3, 2012

Abstract

The superconducting properties of first synthesized new heterofullerides AnMmHgxC60 (A = K, Rb, Cs; M = Be, Mg, B, Al, Ga, In; n = 1, 2; m = 1, 2; x<<1) were investigated at low temperatures. The low frequency inductive method was used to detect a superconducting transition. All the samples were studied by using x-ray, solid state nuclear magnetic resonance, electron spin resonance, and Raman scattering. It is found that the maximum number of the superconducting heterofullerides are heterofullerides of potassium. The fulleride K2GaC60 has a critical temperature of the superconducting tarnsition Тс = 20 К. Heterofullerides of indium and borum are not superconductors. The synthesis of heterofullerides via amalgams (Hg– K–Mg, Hg–Rb–Al) gives rise to two different superconducting phases.

PACS: 61.48.+c Structure of fullerenes and related hollow and planar molecular structures;
PACS: 71.30.+h Metal-insulator transitions and other electronic transitions;
PACS: 74.10.+v Occurrence, potential candidates.

Key words: superconductivity, fullerides, nuclear magnetic resonance, paramagnetic resonance, Raman scattering.

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