Showing papers by "Roland Madar published in 1979"

TL;DR: In this paper, the authors proposed a model for the origin and mechanism of the tetragonal distortion based on the consequences of the strong structural relation between the A-15 cubic structure and the W5Si3 tetragonagonal one.

TL;DR: In this paper, structural instabilities can be systematically induced in metallic perovskites of manganese and analogies are shown between the instabilities and the valence changes in rare earth compounds.