A Novel Pyrochlore Ruthenate : Ca_2Ru_2O_7(Cross-disciplinary physics and related areas of science and technology)
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概要
- 論文の詳細を見る
Single crystals of a novel ruthenate, Ca_2Ru_2O_7, were obtained. An X-ray diffraction study on a single crystal revealed that this material crystallizes in a pyrochlore structure with a lattice parameter, a=10.197A. The magnetic susceptibility above 30K is the summation of a Curie-Weiss contribution and a constant term independent of temperature. The effective moment per Ru atom is only 0.36 μ_B, one order of magnitude smaller than that expected from a localized spin model with S=3/2 for Ru^<5+>. Below 23K, the localized spins freeze in a spin-glass state. The resistivity at room temperature is 2×10^<-3> Ω・cm, comparable to that in metallic, highly correlated oxides.
- 社団法人日本物理学会の論文
- 2006-10-15
著者
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Sato Hirohiko
Department Of Biotechnology Tokyo University Of Agriculture And Technology
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Sato Hirohiko
Chuo Univ. Tokyo
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Munenaka Taiya
Department of Physics, Chuo University
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