Electronic structure and photoemission properties of EuF3 and EuCo2X2 (X = Si, Ge) compounds by ab initio methods

被引：0
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作者：
Deniszczyk, J. [1 ]
Burian, W. [2 ]
Maślankiewicz, P. [2 ]
Szade, J. [2 ]
机构：
[1] Institute of Materials Science, University of Silesia, Katowice, Poland
[2] A. Chelkowski Institute of Physics, University of Silesia, Katowice, Poland
来源：
Journal of Alloys and Compounds | 2007年 / 442卷 / 1-2 SPEC. ISS.期
关键词：
Electronic; magnetic and photoemission properties of the mixed-valence EuF3and EuCo2X2 compounds have been studied theoretically. Calculations have shown that europium is trivalent (4f6) in EuF3 compound. In EuCo2X2; the Eu is of intermediate valence Eu2.5+ (4f6.5). EuF3 compound is found nonmagnetic insulator. In EuCo2X2; only the europium is polarized magnetically. Photoemission (PE) measurements on EuF3 proved the exchange splitting of core s-type levels of europium even though it is in nonmagnetic (J = 0) state. The calculated exchange splitting of the Eu 4s and 5s states compares quantitatively well with the observed ones. © 2007 Elsevier B.V. All rights reserved;
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页码：239 / 241
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