Abstract: We study the electronic structure of the Sr2YRuO6 and Sr2YRu0.75Ir0.25O6 compounds using x-ray (resonant) photoemission and absorption spectroscopies. The experimental results are interpreted with first-principles calculations, which give a good agreement with all the spectra. These results show that, although the spin-orbit coupling does not induce orbital anisotropies in these systems, it is responsible for the reduction of magnetic moments within the the Ir5+ O-6 octahedra, weakening the magnetic ordering in the substituted system. Finally, our findings support the idea that the canting of Ru5+ magnetic moments actually plays an important role in the stabilization of the intriguing magnetic ordering in the Sr2YRuO6 compound.
Author(s): Guedes, E. B.; Abbate, M.; Abud, F.; et al.
O Laboratório Aberto de Interatividade para Disseminação do Conhecimento Científico e Tecnológico (LAbI), vinculado à Universidade Federal de São Carlos (UFSCar), é voltado à prática da divulgação científica pautada na interatividade; nas relações entre Ciência, Arte e Tecnologia.
Highly dense and textured superconducting (Bi,Pb)(2)Sr2Ca2Cu3O10+delta ceramic samples processed by spark-plasma texturing Abstract: Consolidated powders of the superconducting cuprate Bi1.65Pb0.35Sr2Ca2Cu3O10+δ(Bi-2223) by the spark-plasma texturing (SPT), spark-plasma sintering (SPS), and the traditional solid-state reaction method were investigated by several techniques […]
Writers: Barbara Fraygola; Alexandre Mesquita; Adelino A. Coelho; Ducinei Garcia; Valmor R. Mastelaro; and Jose A. Eiras Keywords: anelastic; multiferroics; PFN; PFW; XANES Abstract: Lead-based multiferroics perovskites with nominal compositions Pb(Fe1/2Nb1/2)O3 and Pb(Fe2/3W1/3)O3 were synthesized […]
Writers: Mário L. Moreira; Juan Andrés; Lourdes Gracia; Armando Beltrán; Luciano A. Montoro; José A. Varela; and Elson Longo Keywords: Excited states; Cathodoluminescence; Crystal structure; Band structure; Optical properties Abstract: First-principles calculations set the comprehension […]