EN
In this paper the experimental investigations of the YBa_2Cu_3O_{7-δ} single crystal, using atomic force microscopy and magnetic force microscopy, are presented. The atomic force microscopy was used to identify oxidized and unoxidized YBa_2Cu_3O_{7-δ} crystal. The YBa_2Cu_3O_{7-δ} single oxidized crystal was examined for magnetic properties by means of magnetic force microscopy. The research was carried out at a room temperature and in the air atmosphere without external magnetic field.