Electronic structures of RCuIn and R2CuIn3 (R = La, Ce, Pr)

• Autorzy: Szytuła A , Kalychak Y M , Tyvanchuk Y , Penc B , Winiarski A
• Języki publikacji: EN

Abstrakty

EN

Electronic structures of ternary compounds RCuIn and R2CuIn3 (R = La, Ce, Pr) have been studied by the X-ray photoelectron spectroscopy. The valence bands and the XPS core levels were investigated. The two families of compounds crystallize in different hexagonal crystal structures: ZrNiAl-type for RCuIn and AlB2-type for R2CuIn3. Analysis of the XPS valence bands indicates that they are mainly determined by the Cu 3d band. The analysis of the Ce 3d spectra based on the Gunnarsson-Schönhammer model gives the hybridization of the 4f electrons with the conduction band equal to 45 meV for CeCuIn and to 140 meV for Ce2CuIn3. The appearance of the 3d94f0 component is a clear evidence of the intermediate valence behaviour for cerium. The 4f occupation number is 0.95 for CeCuIn and 0.92 for Ce2CuIn3. The analysis of the other core levels confirms a small influence of the atomic surrounding on the electronic structure.

Słowa kluczowe

EN

rare earth intermetallics; electronic properties; core level

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2008
• Tom: Vol. 26, No. 4
• Strony: 1061--1067
• Opis fizyczny: Bibliogr. 10 poz., tab., wyk.

Twórcy

autor

Szytuła A

• M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Cracow, Poland

autor

Kalychak Y M

autor

Tyvanchuk Y

autor

Penc B

autor

Winiarski A

Bibliografia

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• [6] SZYTUŁA A.,JEZIERSKI A.,PENC B.,FUS D.,J. Magn. Magn. Mater., 222 (2000), 47.
• [7] HÜFNER S., Photoemission Spectroscopy, Springer, Berlin, 1994, p. 435.
• [8] GUNNARSON O., SCHÖNHAMMER K., Phys. Rev. B, 28 (1983), 4315.
• [9] DONIACH S.,ŠUNJIĆM., J. Phys. C, 3 (1970), 285.
• [10] FUGGLE J.C., HILLEBRECHT F.U., ŻOŁNIEREK Z., LÄSSER R., FREIBURG CH., GUNNARSON O., SCHÖNHAMMER K., Phys. Rev. B, 27 (1983), 4313.