A Novel Pyrochlore Ruthenate: Ca2Ru2O7
arXiv:cond-mat/0608593 · doi:10.1143/JPSJ.75.103801
Abstract
Single crystals of a novel ruthenate, Ca2Ru2O7, 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 = 10.197 Angstroms. The magnetic susceptibility above 30 K 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 Bohr magnetons, one order of magnitude smaller than that expected from a localized spin model with S=3/2 for Ru5+. Below 23 K, the localized spins freeze in a spin-glass state. The resistivity at room temperature is 2E-3 Ohm cm, comparable to that in metallic, highly correlated oxides.}
11 pages, 3 figures, J. Phys. Soc. Jan., in press
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Cited by in corpus (11)
- Magnetic Pyrochlore Oxides
- Suppression of the antiferromagnetic metallic state in the pressurized MnBi2Te4 single crystal
- Antiferromagnetism at T > 500 K in the Layered Hexagonal Ruthenate SrRu2O6
- Spin-glass transition in bond-disordered Heisenberg antiferromagnets coupled with local lattice distortions on a pyrochlore lattice
- Metal-insulator Transition in a Pyrochlore-type Ruthenium oxide, Hg2Ru2O7
- Effect of magnetoelastic coupling on spin-glass behavior in Heisenberg pyrochlore antiferromagnets with bond disorder
- Magnetic ground state of pyrochlore oxides close to metal-insulator boundary probed by muon spin rotation
- Fully filling-controlled pyrochlore ruthenates: emergent ferromagnetic-metal state and geometrical Hall effect
- Magnetic structures and electronic properties of cubic-pyrochlore ruthenates from first principles
- Metal-insulator transitions in pyrochlore oxides
- Electronic Self-Organization in the β-Pyrochlore Oxide CsW2O6