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摘要
GaN:Cr and GaN:Fe single crystals as well as GaN:Mn micropowders highly doped by transition metals were grown to investigate low temperature superconductivity. Magnetic measurements revealed type I superconductivity with T-C approximate to 6 K and H-C approximate to 600 Oe, identical for all compounds and also identical to that observed before in GaP:Cr and GaAs:Cr. The presence of amorphous inclusions of gallium may explain existing superconductivity as a result of a phase transition leading to beta-Ga during cooling down of the sample Since the observed parameters are close to those characteristic for superconducting Ga(II) this possibility could not be ruled out.
- 出版日期2013-11
