Abstract (EN):
The phase diagram of Gd1-xYxMnO3, 0 <= x <= 0.4, is presented and the role of the driving mechanisms in stabilizing both magnetic and ferroelectric orderings is discussed in the framework of the Dzyaloshinskii-Moriya model. The (x, T) phase diagram reflects the effect of lattice distortions induced by the substitution of Gd3+ ion by smaller Y3+ ions, which gradually unbalances the antiferromagnetic against the ferromagnetic exchange interactions, enabling the emergence of ferroelectricity for higher concentrations of yttrium.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
7