The peculiarities of local structure of YbNi2 and YbCo2 intermetallics synthesized at high pressure.

2nd Conference on Plasma & Laser Research and Technologies

Chernysheva, O.V.^1 ; Menushenkov, A.P.^1 ; Tsvyashchenko, A.V.^2 ; Fomicheva, L.N.^2 ; Ivanov, A.A.^1 ; Kuznetsov, A.V.^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe sh. 31, Moscow

115409, Russia^1

Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences, Kaluzhskoe sh. 14, Troitsk, Moscow

142190, Russia^2

关键词: Absorption edges;    High pressure;    Local structure;    Short-range magnetic orders;    Static disorder;    Temperature decrease;    XANES measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/747/1/012028/pdf
DOI  :  10.1088/1742-6596/747/1/012028

来源: IOP

【 摘 要 】

Local structure of YbCo2and YbNi2was investigated by EXAFS and XANES spectroscopy. It was found that the bond Yb-Co(Ni) has the highest static disorder and its length increases with temperature decrease, while all other bonds remain almost unchanged. This phenomenon may be caused by short-range magnetic ordering at temperatures above the phase transition. XANES measurements above ZIII-Yb absorption edge in YbCo2and YbNi2revealed that both compounds have almost the same density of free 5d-states.