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Influence of nonstoichiometry defects on magnetic and electric transport properties of high-temperature superconductors

Zero-dimensional  deficiency in Sr2FeMoO6-δ structure

One can see from experimental results that magnetic moments of the double perovskite are lower than the theoretically calculated ones. This discrepancy can be explained by the formation of antisite point defects, such as [Fe]Mo, [Mo]Fe or of oxygen vacancies (V0).


This should lead to the change of the type of exchange interactions. Therefore it is important to maintain the appropriate partial oxygen pressure taking into account synthesis conditions.



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