Nihon Kessho Gakkaishi
Online ISSN : 1884-5576
Print ISSN : 0369-4585
ISSN-L : 0369-4585
Articles
Magnetic Structure of Post-Perovskite Compound CaIrO3
Kenya OHGUSHIHiroyuki OHSUMIJun-ichi YAMAURATaka-hisa ARIMA
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2014 Volume 56 Issue 1 Pages 36-42

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Abstract

We have performed resonant X-ray diffraction experiments at the Ir L absorption edges for a post-perovskite compound CaIrO3 with a Ir4+:(t2g5 electronic configuration. By observing the magnetic signals, we could clearly see that the magnetic structure was a striped ordering with antiferromagnetic moments along the c axis and that the wave function of a t2g hole is strongly spin-orbit entangled, the Jeff=1/2 state. The observed spin arrangement is consistent with a theoretical work predicting a unique superexchange interaction called the quantum compass model. Our studies stimulate further studies for developing novel quantum states in iridium oxides.

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© 2014 The Crystallographic Society of Japan
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