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Toward the stabilization of perovskite phase at low temperature and decrease of the magnetic ordering by Sr2+-doping in LaCrO3

2021; Elsevier BV; Volume: 787; Linguagem: Inglês

10.1016/j.cplett.2021.139278

1873-4448

Romualdo S. Silva, Nilson S. Ferreira, Jean-Philippe Fontes, M.E.H. Maia da Costa, Petrucio Barrozo,

Multiferroics and related materials

We investigate the Sr2+-doping influence on the structural, chemical, and magnetic properties of LaCrO3 prepared by a modified combustion method. X-ray diffraction (XRD) results indicate that samples crystallized in an orthorhombic structure, which were stable in heat treatments lower 1073 K. X-ray photoelectron spectroscopy (XPS) results showed a tendency to favor the oxidize of Cr3+ forming more Cr4+ and Cr6+ ions for the La0.9Sr0.1CrO3. The magnetic measurements reveal that the Sr2+-doping does not change the antiferromagnetic order of LaCrO3 but induces a slight decrease in the magnetic transition temperature, multiple magnetic transitions, and an increase in the hysteresis opening, which are associated with a decrease of the spin canted that favors the Cr3+–O–Cr4+ double exchange interactions.