Structural and magnetic properties of LaCrO3 half-doped with Al. Issue 13 (October 2016)

• Record Type: Journal Article
• Authors: Silva, Romualdo S.; Barrozo, Petrucio; Moreno, N.O.; Aguiar, J. Albino
• Is Part Of: Ceramics international. Volume 42:Issue 13(2016)
• Page Start: 14499
• Page End: 14504
• Publication Date: 2016-10
• Subjects: Combustion synthesis -- Structural transition -- Rietveld analysis -- Perovskite -- LaCrO3 -- LaAlO3; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.06.059
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Structural and magnetic properties of LaCrO3 half-doped with Al are reported in this work. Pure and half-doped samples were prepared by combustion synthesis using urea as fuel. The crystal structure was investigated by X-ray diffraction and Rietveld analysis. A structural phase transition caused by a decrease of the chemical pressure was observed. The scanning electron microscopy (SEM) images show the formation of porous samples with particles of irregular morphologies. A quantitative Energy-dispersive X-ray spectroscopy (EDS) analysis on the surface indicates the inclusion of the Al on the structure. However, a small deficiency of La and Al was observed. Magnetization measurements as a function of temperature reveal an antiferromagnetic order in both samples. A large decrease of TN (Néel temperature) and a reduction of the frustration factor is observed in the sample doped with Al. The magnetic isothermal at 5 K shows a typical antiferromagnetic behavior with a slightly spin canting for the doped sample.