Synthesis, structure and magnetic properties of the new double perovskite Ca2CrSbO6 |
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Authors: | M. Retuerto,J.A. Alonso,M. Garcí a-Herná ndez,M.J. Martí nez-Lope |
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Affiliation: | Instituto de Ciencia de Materiales de Madrid, CSIC. Cantoblanco, E-28049 Madrid, Spain |
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Abstract: | The title double perovskite has been synthesized by solid-state reaction in air. The crystal structure has been studied from powder X-ray diffraction data. Rietveld fits to the pattern show that this compound has a monoclinic symmetry [a=5.4932(3) Å, b=5.4081(3) Å, c=7.6901(5) Å, β=90.0022(1)°, at 300 K] defined in the space group P21/n, where the Cr and Sb cations are almost completely ordered in the B-sublattice of the perovskite structure. Magnetic susceptibility and magnetization measurements show that this compound behaves as a Curie-Weiss paramagnet at high temperatures with μeff=3.53(1) μB and θP=8 K, and exhibits a robust ferromagnetic component below the ordering temperature of TC=13 K, with a saturation magnetization of 2.36 μB/f.u. at 5 K. To our knowledge, this is the first example of a ferromagnetic double perovskite containing a non-magnetic element, such as Sb, occupying one half of the B positions of the perovskite structure. |
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Keywords: | 75.50.Dd |
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