Electronic properties of CeNi4Si compound

• Autorzy: Falkowski M. , Kowalczyk A. , Toliński T. , Chełkowska G.
• Konferencja: Conference New Materials for Magnetoelectronics, Będlewo, 3-6 May 2006
• Języki publikacji: EN

Abstrakty

EN

Temperature dependence of the specific heat for CeNi4Si was analyzed. These studies were supported by magnetic susceptibility, electrical resistivity and X-ray photoemission spectroscopy measurements.CeNi4Si is paramagnetic and follows the Curie-Weiss. This effective paramagnetic moment is lower than that for the free Ce3+. The f-occupancy nf and coupling between the f level and the conduction state are derived to be about 0.91 and 36 meV, respectively. Both the susceptibility data and the XPS spectra have shown that Ce ions are in intermediate valence state. The specific heat has been analyzed considering the electronic contribution, the Schottky anomaly, and the lattice contributions within the Debye model. The scheme of the energy levels created by the crystal electric field split is determined from the Schottky contribution to the specific heat.

Słowa kluczowe

EN

XPS; specific heat of solids; mixed valence

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2007
• Tom: Vol. 25, No. 2
• Strony: 321--326
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Falkowski M.

autor

Kowalczyk A.

autor

Toliński T.

autor

Chełkowska G.

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

Bibliografia

• [1] KOWALCZYK A., FALKOWSKI M., TOLIŃSKI T., CHEŁKOWSKA G., Solid State Commun., Solid State Commun., 139 (2006), 5.
• [2] KOWALCZYK A., SZAJEK A., FALKOWSKI M., CHEŁKOWSKA G., J. Magn. Magn. Mat., 305 (2006), 348.
• [3] GUNNARSSON O., SCHÖNHAMMER K., Phys. Rev., B 28 (1983), 4315.
• [4] SVOBODA P., VEJPRAVOVA J., KIM-NGAN N-T.H., KAYSEL F., J. Magn. Magn., 272 (2004), 595.
• [5] TOLIŃSKI T., KOWALCZYK A., SZEWCZYK A., GUTOWSKA M., J. Phys. Cond. Matter., 18 (2006), 3435.
• [6] KADOWAKI K., WOODS S.B., Solid State Commun., 58 (1986), 507.
• [7] KOWALCZYK A., PUGACZOWA-MICHALSKA M., TOLIŃSKI T., phys. stat. sol. (b), 242 (2005), 433.