L. T. CORREDOR ET AL.
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6. References
Table 3. Results of semi quantitative EDX analysis for the
Sr2GdRuO6 sample.
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Ru 29.69 30.05
Gd 19.09 19.78
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35
ef fGd Ru
.This result corresponds to 98.3% of
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4. Conclusions
We have performed an experimental study on crystalline
structure, surface morphology, composition and mag-
netic response of Sr2GdRuO6 oxide ceramic. Rietveld
refinement of X-ray diffraction pattern showed that ma-
terial crystallizes in a monoclinic complex perovskite
structure with space group P21/n (#14), with an alternat-
ing distribution between Ru+5 and Gd+3 ions on the six
coordinate B sites of the complex perovskite. The pres-
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in the diffractogram confirms the existence of the super-
structure that characterizes the A2BB’O6, Complex
perovskites. The image of scanning electron microscopy
reveals the strongly compact characteristic of grains with
sizes from 2 up to 7 µm. The results of Energy Disper-
sive X-ray experiments show that the composition of the
material corresponds in a 98% to the expected
stoichiometry of Sr2GdRuO6 complex perovskite. Mag-
netic susceptibility experiments permitted to determine
the occurrence of a paramagnetic-antiferromagnetic tran-
sition with a Néel temperature of 15.3 K. From the
analysis of susceptibility curves we found the effective
magnetic moment to be 8.72µB. In the dc susceptibility
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5. Acknowledgements
This work was partially supported by the Colombian
agencies Colciencias, the Division of Investigations,
Universidad Nacional de Colombia (DIB - Bogotá), and
Brazilian CNPq.