Antiferromagnetism with divalent Eu in EuNi5As3

作者：Jiang, W. B.; Smidman, M.^*; Xie, W.; Liu, J. Y.; Lee, J. M.; Chen, J. M.; Ho, S. C.; Ishii, H.; Tsuei, K. D.; Guo, C. Y.; Zhang, Y. J.; Lee, Hanoh; Yuan, H. Q.

来源：Physical Review B, 2017, 95(2): 024416.

DOI：10.1103/PhysRevB.95.024416

• HEAVY-FERMION
• PHASE
• EUNI2P2
• NICKEL

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 T-N1 = 7.2 K and T-N2 = 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.

• 出版日期2017-1-17
• 单位浙江大学