Magnetic-ordered and superconducting units within the surface layers of PbTe: Eu crystals grown from melt by the Bridgman method - D. M. Zayachuk; O. S. Ilyina; D. Kaczorowski; V. I. Mikityuk; V. V. Shlemkevych (Semiconductor Physics, Quantum Electronics and Optoelectronics, 2013)