We have successfully synthesized single crystals of EuNi5As3 using a flux method and we present a comprehensive study of the physical properties using magnetic susceptibility, specific heat, electrical resistivity, thermoelectric power and x-ray absorption spectroscopy (XAS) measurements. EuNi5As3 undergoes two close antiferromagnetic transitions at respective temperatures of TN1 = 7.2 K and TN2 = 6.4 K, which are associated with the Eu2+ moments. Both transitions are suppressed upon applying a field and we map the temperature-field phase diagrams for fields applied parallel and perpendicular to the easy a axis. XAS measurements reveal that the Eu is strongly divalent, with very little temperature dependence, indicating the localized Eu2+ nature of EuNi5As3, with a lack of evidence for heavy fermion behavior.
@article{arxiv.1701.05326,
title = {Antiferromagnetism with divalent Eu in EuNi$_5$As$_3$},
author = {W. B. Jiang and M. Smidman and W. Xie and J. Y. Liu and J. M. Lee and J. M. Chen and S. C. Ho and H. Ishii and K. D. Tsuei and C. Y. Guo and Y. J. Zhang and Hanoh Lee and H. Q. Yuan},
journal= {arXiv preprint arXiv:1701.05326},
year = {2017}
}