Y. G. Zargaryan, A. I. Vahanyan, N. P. Harutyunyan, E. V. Aghababyan, K. H. Begoyan, E. A. Mughnetsyan, H. R. Hovhannisyan, “The effect of doping on the superconductivity of the <nobr>$\mathrm{YBa_2Cu_3O_y}$</nobr>”, Proceedings of the YSU, Physical and Mathematical Sciences, 2005, Issue 2,Pages <nobr>46

Physics

The effect of doping on the superconductivity of the $\mathrm{YBa_2Cu_3O_y}$

Y. G. Zargaryan^a, A. I. Vahanyan^b, N. P. Harutyunyan^b, E. V. Aghababyan^b, K. H. Begoyan^a, E. A. Mughnetsyan^a, H. R. Hovhannisyan^c

^a Yerevan State University Ijevan Branch
^b Yerevan State University
^c International Scientific-Educational Center of NAS RA

Abstract: The superconducting ceramic samples in $\mathrm{Y-Ba-Cu-O}$ system with various content of fluorine are synthesized.
It is found, that even slight doping of $\mathrm{YBa_2Cu_3O_yF_x}$ by fluorine $(х=0,05)$ shifts of the superconducting transition towards high temperatures by $10-12 K$.
The obtained data are interpreted suggesting the generation of acceptor levels in a forbidden band and presence of holes in $\mathrm{YBa_2Cu_3O_y}$ when doping by fluorine, that enhances the temperature of charge carrier "pairing".

Received: 18.03.2005
Accepted: 31.03.2005