Hydrothermal synthesis and magnetic properties of SmCr_0.5M_0.5O₃(M=Fe and Mn) micro-plates

Abstract

Nanostructured B-site Fe and Mn doped SmCrO3 was prepared by mild hydrothermal growth. The as-prepared crystals are mainly micrometer-scale plates, ranging from rhombus(SmCr_0.5M_0.5O₃) to elongated he-xagonal(SmCr_0.5Mn_0.5O₃), and finally to well-edged rectangular(SmCr_0.17Mn_0.5Fe_0.33O₃) plates. Fe and Mn doped SmCrO₃ crystals are indexed into Pbnm space group. The cell parameters of SmCr_0.5M_0.5O₃ are slightly smaller than that of pristine SmCrO3. Binding energy analysis of Cr, Mn and Fe in SmCr_0.17Mn_0.5Fe_0.33O₃ sample indicates that they all possess +3 oxidation states. Temperature dependent magnetization of the as-prepared samples presents obviously stronger ferromagnetic interactions than the undoped counterparts. This work represents a remarkable de-velopment for hydrothermal synthesis into fabricating perovskite oxide crystals with uniform distribution of doping ions.

Keywords

Hydrothermal synthesis / Perovskite structure / B-Site ordering / Magnetic property

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