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Tuning the Magnetic Ground State of Ce

调整Ce的磁性基态

【作       者】:

S. Jang,N. Pouse,T. Keiber,...

【机       构】: 美国国家标准与技术研究院
【承研机构】:

【原文地址】: https://www.nist.gov/publications/tuning-magnetic-ground-state-ce1-xybxrhin5-yb-valence-fluctuations
【发表时间】:

2018-11-16

摘要

We characterize the properties of CeYbRhInsingle crystals with 0 {less than or equal to} x {less than or equal to} 1 using measurements of powder x-ray diffraction (XRD), energy dispersive x-ray spectroscopy (EDS), electrical resistivity, magnetic susceptibility, specific heat, x-ray absorption near edge structure (XANES), and neutron diffraction. The Yb valence, υYb, calculated from the magnetic susceptibility and measured using XANES, decreases from 3+ at X = 0 to ~2.1+ at X- 0.2, where xis the measured Yb concentration. A transition from incommensurate to commensurate antiferromagnetism (AFM) is observed in neutron diffraction measurements along Q = (0.5, 0.5 l) between 0.2 {less than or equal to}x{less than or equal to}0.27; this narrative is supported by specific heat measurements in which a second robust feature appears at a temperature T(Tn) for the same concentration range. Magnetic susceptibility measurements also reveal features which provide additional evidence of magnetic ordering. The results of this study suggest that the evolution of the Yb valence plays a critical role in tuning the magnetic ground state of CeYbRhIn.

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