3 years ago

Perovskite-Type InCoO3 with Low-Spin Co3+: Effect of In–O Covalency on Structural Stabilization in Comparison with Rare-Earth Series

Perovskite-Type InCoO3 with Low-Spin Co3+: Effect of In–O Covalency on Structural Stabilization in Comparison with Rare-Earth Series
Yu Kumagai, Pascal Manuel, Fumiyasu Oba, Hirofumi Akamatsu, Takahiro Kawamoto, Katsuhisa Tanaka, Ryo Fujikawa, Olivier Hernandez, Koji Fujita, Suguru Yoshida, Masayuki Fukuda, Ikuya Yamada
A new perovskite cobaltite, InCoO3, was synthesized via high-pressure and high-temperature treatment at 15 GPa and 1450 °C. It crystallizes in the Pnma space group and exhibits diamagnetism with a low-spin state of Co3+ below 300 K. Comprehensive structural studies on newly developed and well-known Pnma ACoO3 perovskites (A = Sc, In, Y, Pr−Lu) highlight the role of In−O covalent bonding in InCoO3 with respect to stabilization of the orthorohombic perovskite structure.

Publisher URL: http://dx.doi.org/10.1021/acs.inorgchem.7b01426

DOI: 10.1021/acs.inorgchem.7b01426

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