Magnetoresistance scaling in the layered cobaltate Ca3Co4O9

Abstract

We investigate the low temperature magnetic field dependences of both the resistivity and the magnetization in the misfit cobaltate Ca3Co4O9 from 60 K down to 2 K. The measured negative magnetoresistance reveals a scaling behavior with the magnetization which demonstrates a spin dependent diffusion mechanism. This scaling is also found to be consistent with a shadowed metalliclike conduction over the whole temperature range. By explaining the observed transport crossover, this result shed a new light on the nature of the elementary excitations relevant to the transport.

References in corpus (7)

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• Strongly correlated properties of the thermoelectric cobalt oxide Ca3Co4O9
• Scaling behavior in thermoelectric misfit cobalt oxides
• Na Induced Correlations in Na${}_x$CoO${}_2$
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Cited by in corpus (5)

• Local Structure of Thermoelectric Ca3Co4O9
• From quantum criticality to enhanced thermopower in strongly correlated layered cobalt oxide
• Magnetic field dependent specific heat and enhanced Wilson ratio in strongly correlated layered cobalt oxide
• ω/T scaling of the optical conductivity in strongly correlated layered cobalt oxide
• Nonlinear transport associated with spin-density-wave dynamics in Ca${}_3$Co${}_4$O${}_9$