Estudo das propriedades magnéticas e estruturais do composto BaLa2ZnO5 dopados com elementos de Gd, Er e Yb.

Abstract

In this monograph the magnetic properties and structural structures of the compound BaLa2ZnO5 doped with Gd, Er and Yb elemnts were investigated. To obtain the samples, the synthesis of solid state reaction was used. Through the powder diffraction data of x-rays, diffraction patterns were obtained for each sample and identified the formation of crystalline phases. The results for the magnetic characterization indicate that there was a possible contamination in the sample without the presence of dopants, the data related to dopings suggest a paramagnetic behavior with a slight tendency for antiferromagnetic interaction, in which the Curie-Weiss temperature found for each sample was 𝑇𝑐𝑤 = - 1.052 ± 0.004 K, 𝑇𝑐𝑤 = -4.01 ± 0.02 K and 𝑇𝑐𝑤 = -2.94 ± 0.04 K. In addition, the magnetization curves as a function of the applied field suggest a competition between ferromagnetic interactions and antiferromagnetic.