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arXiv · 1701.05326

Antiferromagnetism with divalent Eu in EuNi$_5$As$_3$

W. B. Jiang·M. Smidman·W. Xie·J. Y. Liu·J. M. Lee·J. M. Chen·S. C. Ho·H. Ishii·K. D. Tsuei·C. Y. Guo·Y. J. Zhang·Hanoh Lee·H. Q. Yuan
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Abstract

We have successfully synthesized single crystals of EuNi$_5$As$_3$ 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. EuNi$_5$As$_3$ undergoes two close antiferromagnetic transitions at respective temperatures of $T_{N1}$ = 7.2 K and $T_{N2}$ = 6.4 K, which are associated with the Eu$^{2+}$ 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 Eu$^{2+}$ nature of EuNi$_5$As$_3$, with a lack of evidence for heavy fermion behavior.

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W. B. Jiang, M. Smidman, W. Xie, J. Y. Liu, J. M. Lee, J. M. Chen, S. C. Ho, H. Ishii, K. D. Tsuei, C. Y. Guo, Y. J. Zhang, Hanoh Lee, H. Q. Yuan. 2017-01-19. Antiferromagnetism with divalent Eu in EuNi$_5$As$_3$. https://doi.org/10.1103/physrevb.95.024416

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