Magnetotransport properties of BaRuO 3: Observation of two scattering rates

Y. A. Ying, Y. Liu, T. He, R. J. Cava

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Abstract

We report results of low-temperature magnetotransport and Hall measurements on single crystals of four-layered hexagonal (4H) and nine-layered rhombohedral (9R) BaRuO 3 that provide insight into the structure-property relationships of BaRuO 3 polymorphs. We found that 4H BaRuO 3 possesses Fermi-liquid behavior down to the lowest temperature (T) of our measurements, 1.8 K. On the other hand, 9R BaRuO 3 was found to show a crossover in the temperature dependence of resistivity around 150 K and the existence of two separate scattering rates at low temperatures. The magnetoresistance in the 9R BaRuO 3 was found to be negative while that in the 4H BaRuO 3 is positive. We propose that local moments may be present in 9R but not in 4H BaRuO 3, which leads to distinctly different behavior in the two forms.

Original languageEnglish (US)
Article number233104
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number23
DOIs
StatePublished - Dec 20 2011

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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