4/7/2024 0 Comments Cach cai matrix 6.0 sr 5A spin glass-like state has been observed at low temperatures for all the series, with freezing temperatures increasing with the Ti-content in the range 22 to 33 K. As a result of aliovalent substitution of Nb 5+ by Ti 4+ in the parent Sr 2CoNbO 6 mixed-valence Co 3+/Co 4+ oxides are obtained. The size and number of the double-cubic perovskite domains decrease as the Ti content increases. The microstructure consists of double-cubic perovskite domains grown in a simple-cubic perovskite matrix. Although these oxides show an average simple-cubic perovskite structure, they present a flexible microstructure due to short-range ordering between Co/Ti and Nb cations in the perovskite B-sites. We report the rich magnetic behaviour of Sr 2CoNb 1− xTi xO 6 (0 ≤ x ≤ 0.5) oxides as a result of their complex microstructure.
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