Uniaxial magnetocrystalline anisotropy in ${\rm CaRuO_3}$

Details Uniaxial magnetocrystalline anisotropy in ${\rm CaRuO_3}$ Uniaxial magnetocrystalline anisotropy in ${\rm CaRuO_3}$

2005-08-31

arxiv.org/abs/nlin/0508038v1

Nonlinear Sciences

Pattern Formation and Solitons

7 figures

Scientific paper

${\rm CaRuO_3}$ is a paramagnetic metal and since its low temperature resistivity is described by $\rho=\rho_0+AT^\gamma $ with $\gamma \sim 1.5$, it is also considered a non-Fermi liquid (NFL) metal. We have performed extensive magnetoresistance and Hall effect measurements of untwinned epitaxial films of ${\rm CaRuO_3}$. These measurements reveal that ${\rm CaRuO_3}$ exhibits uniaxial magnetocrystalline anisotropy. In addition, the low-temperature NFL behavior is most effectively suppressed when a magnetic field is applied along the easy axis, suggesting that critical spin fluctuations, possibly due to proximity of a quantum critical phase transition, are related to the NFL behavior.

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