Resistivity Anisotropy in Single Crystals of CaCo$_{1.86}$As$_2$
ORAL
Abstract
In-plane and inter-plane resistivity was measured in single crystals of type A antiferromagnet CaCo$_{2-x}$As$_2$ ($x=$ 0.14). Clear anomalies in the temperature dependent resistivity are observed at the magnetic ordering at $T_N \approx$50~K. The transition shifts to lower temperatures upon application of 9 T magnetic field both along tetragonal (001) axis, $H \parallel c$, and transverse to it, $H \bot c$. The temperature – - magnetic field phase diagrams determined from the resistivity measurements are in good agreement with magnetization measurements [1]. No additional anomalies are found at the spin-flop transition in the compound, suggesting that the direction of the spin does not play an appreciable role in the spin-disorder scattering in this compound. [1] V.~K.~Anand {\it et al.} Phys. Rev B {\bf 89}, 214409 (2014).
*This work was supported by the U.S. Department of Energy, Office of Basic Energy Science, Materials Science and Engineering Division and was performed at the Ames Laboratory, Iowa State University under contract DE-AC02-07CH11358.
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