A Mitsuda et al 2000 J. Phys.: Condens. Matter 12 5287 doi:10.1088/0953-8984/12/24/317
A Mitsuda1,3, H Wada1, M Shiga1 and T Tanaka2
Show affiliationsWe examine the temperature dependence of the Eu valence and lattice parameters for Eu(Pd1-xPtx)2Si2 by means of x-ray absorption spectroscopy (XAS) and x-ray diffraction, respectively. Strong temperature dependence of the Eu valence was observed for Eu(Pd1-xPtx)2Si2. Combining the Mössbauer effect data and XAS results, we estimated the Eu valence as a function of temperature. It is shown that the Eu valence in the ground state shows very little sensitivity to x for 0≤x≤0.10. In the temperature dependence of the Eu valence, the compound with x = 0.05 undergoes a continuous valence change, while the one with x = 0.15 shows a first-order valence transition. The factors determining the Eu valence in Eu(Pd1-xPtx)2Si2 are discussed.
76.80.+y Mössbauer effect; other γ-ray spectroscopy
Issue 24 (19 June 2000)
Received 25 January 2000, in final form 11 April 2000
A Mitsuda et al 2000 J. Phys.: Condens. Matter 12 5287
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