Synthesis and Magnetic and Charge-Transport Properties of the Correlated 4d Post-Perovskite CaRhO3

A high-quality polycrystalline sample of the correlated 4d post-perovskite CaRhO3 (Rh4+: 4d5, S el = 1/2) was attained under a moderate pressure of 6 GPa. Since the post-perovskite is quenchable at ambient pressure/temperature, it can be a valuable analogue of the post-perovskite MgSiO3 (stable high...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2009-02, Vol.131 (7), p.2722-2726
Main Authors: Yamaura, Kazunari, Shirako, Yuichi, Kojitani, Hiroshi, Arai, Masao, Young, David P, Akaogi, Masaki, Nakashima, Mamoru, Katsumata, Tetsuhiro, Inaguma, Yoshiyuki, Takayama-Muromachi, Eiji
Format: Article
Language:English
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Summary:A high-quality polycrystalline sample of the correlated 4d post-perovskite CaRhO3 (Rh4+: 4d5, S el = 1/2) was attained under a moderate pressure of 6 GPa. Since the post-perovskite is quenchable at ambient pressure/temperature, it can be a valuable analogue of the post-perovskite MgSiO3 (stable higher than 120 GPa and unstable at ambient pressure), which is a significant key material in earth science. The sample was subjected for measurements of charge-transport and magnetic properties. The data clearly indicate it goes into an antiferromagnetically ordered state below ∼90 K in an unusual way, in striking contrast to what was observed for the perovskite phase. The post-perovskite CaRhO3 offers future opportunities for correlated electrons science as well as earth science.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja8091906