Structural Transition and Magnetic Properties of (Sr_2-3xLa_2xBa_x)FeMoO₆

Abstract:

Ordered double perovskite oxides (Sr2-3xLa2xBax)FeMoO6 (0≤x≤0.3) have been investigated in this work. X-ray powder diffraction reveals that the crystal structure of the compounds changes from a tetragonal I4/m lattice to a cubic Fm 3m lattice around x=0.2. Though the nominal average size of the A site cation of (Sr2-3xLa2xBax)FeMoO6 is designed to be almost independent of x, the refinements of the crystal structure show that the lattice constants increase with x in both the tetragonal and the cubic phase regions due to electron doping. As the x increases, the degree of cationic ordering on the B site is decreased pronouncedly, while the Curie temperature of the compounds is nearly unchanged.

• Periodical: Materials Science Forum (Volumes 663-665)
• Pages: 1036-1040
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.663-665.1036
• Online since: November 2010
• Authors: Zhen Feng Xu, Jun Liang, Juan Pei, Yan Yan Yin, Chang Li
• Keywords: Crystal Structure, Electron Doping

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