Metal-insulator transition and the Pr${}^{3+}$/Pr${}^{4+}$ valence shift in (Pr${}_{1-y}$Y${}_y$)${}_{0.7}$Ca${}_{0.3}$CoO${}_3$

J. Hejtmánek, E. Šantavá, K. Knížek +4

The magnetic, electric and thermal properties of the ($L{n}_{1-y}$Y${}_y$)${}_{0.7}$Ca${}_{0.3}$CoO${}_3$ perovskites ($Ln$~=~Pr, Nd) were investigated down to very low temperatures. The m…