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Structural and magnetic investigation of In₂Fe₂₋ₓGaₓCuO₇ Public Deposited

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  • The solid solution of In₂Fe₂₋ₓGaₓCuO₇ (space group P6₃/mmc) was synthesized and investigated through X-ray diffraction and magnetic susceptibility studies. Limited changes to the lattice parameters were observed as a result of the similar ionic radii for Fe³⁺ and Ga³⁺ in the trigonal bipyramidal (TBP) crystallographic site. An increase in the Weiss temperature, along with spin glass behavior are observed from x = 0 – 2, but irregularities in the trend are apparent for x = 0.75 and 1. With the highest concentration in magnetic ions, In₂Fe₂CuO₇ appears to have competing nearest neighbor interactions that produce a suppression of the Curie tail and the experimental magnetic moment. In comparison to InFe₁₋ₓGaₓCuO₄, both solid solutions show an invariable progression of the lattice parameters, but the magnetic properties are greatly affected by the distinct TBP layering schemes.
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  • Grajczyk, R., Chan, A., Ramirez, A.P., & Subramanian, M.A. (2013). Structural and magnetic investigation of In₂Fe₂₋ₓGaₓCuO₇. Journal of Solid State Chemistry, 204, 213-218. doi:10.1016/j.jssc.2013.06.005
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  • 204
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  • This work was supported by NSF Grant DMR 0804167.
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