Magnetotransport properties of BaRuO 3: Observation of two scattering rates

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

doi:10.1103/PhysRevB.84.233104

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 language	English (US)
Article number	233104
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	84
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevB.84.233104
State	Published - Dec 20 2011

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.84.233104

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title = "Magnetotransport properties of BaRuO 3: Observation of two scattering rates",

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.",

author = "Ying, {Y. A.} and Y. Liu and T. He and Cava, {R. J.}",

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TY - JOUR

T1 - Magnetotransport properties of BaRuO 3

T2 - Observation of two scattering rates

AU - Ying, Y. A.

AU - Liu, Y.

AU - He, T.

AU - Cava, R. J.

PY - 2011/12/20

Y1 - 2011/12/20

N2 - 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.

AB - 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.

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ER -

Magnetotransport properties of BaRuO ₃: Observation of two scattering rates

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