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Uniaxial magnetocrystalline anisotropy in ${\rm CaRuO_3}$

Moty Schultz·Lior Klein·J. W. Reiner·M. R. Beasley
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Abstract

${\rm CaRuO_3}$ is a paramagnetic metal and since its low temperature resistivity is described by $ρ=ρ_0+AT^γ$ with $γ\sim 1.5$, 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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Moty Schultz, Lior Klein, J. W. Reiner, M. R. Beasley. 2005-08-31. Uniaxial magnetocrystalline anisotropy in ${\rm CaRuO_3}$. https://doi.org/10.1103/physrevb.73.085109

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