Abstract
A quasi-one-dimensional magnetism was discovered in the post-perovskite CaRuO (Ru: , Cmcm), which is isocompositional with the perovskite CaRuO (Pbnm). An antiferromagnetic (AFM) spin-chain function with −/ 350 K reproduces the experimental curve of the magnetic susceptibility vs temperature well, suggesting long-range AFM correlations. The anisotropic magnetism is probably owed to the -- and -- superexchange bonds along the axis. The Sommerfeld coefficient of the specific heat is fairly small, 0.16(2) mJ mol , indicating that the magnetism reflects the localized nature of the 4 electrons. This is an observation of an integer ( 1) spin-chain AFM in the 4 electron system.
1 More- Received 2 March 2011
- Corrected 17 May 2011
DOI:https://doi.org/10.1103/PhysRevB.83.174411
©2011 American Physical Society
Corrections
17 May 2011
Erratum
Publisher’s Note: Integer spin-chain antiferromagnetism of the oxide CaRuO with post-perovskite structure [Phys. Rev. B 83, 174411 (2011)]
Y. Shirako, H. Satsukawa, X. X. Wang, J. J. Li, Y. F. Guo, M. Arai, K. Yamaura, M. Yoshida, H. Kojitani, T. Katsumata, Y. Inaguma, K. Hiraki, T. Takahashi, and M. Akaogi
Phys. Rev. B 83, 179901 (2011)
Synopsis
Squeezing in magnetism
Published 5 May 2011
A slightly denser version of a transition-metal oxide, with the same chemical composition, has radically different magnetic properties.
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