Electronic structure of CePdAl; experiment and calculations

• Autorzy: Głogowski W. , Goraus J. , Ślebarski A.
• Języki publikacji: EN

Abstrakty

EN

CePdAl exhibits an antiferromagnetic phase below TN = 2.7 K; its physical properties are typical of heavy fermion compounds (specific heat coefficient γ= C/T = 270 mJ/(mol�EK2)). The triangular coordination symmetry of the magnetic Ce ions gives rise to geometrical frustration and leads to an incommensurate antiferromagnetic structure below TN, showing a coexistence of ordered and frustrated Ce moments. The purpose of this work was to discuss electronic structure of CePdAl and its influence on the geometrical frustration in the Kagome-like lattice and the Kondo effect in CePdAl. We present the results of the X-ray diffraction analysis and the XPS Ce 3d core and valence band spectra. We also present the spinpolarized band structure calculations for CePdAl, using the LAPW method.

Słowa kluczowe

EN

strongly correlated electron systems; electronic structure

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2008
• Tom: Vol. 26, No. 3
• Strony: 729--734
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Głogowski W.

autor

Goraus J.

autor

Ślebarski A.

• Institute of Physics, University of Silesia, 40-007 Katowice, Poland,

Bibliografia

• [1] KITAZAWA H., MATSUSHITA A., MATSUMOTO T., SUZUKI T., Physica B, 199–200 (1994), 28.
• [2] HULLIGER F., J. Alloys Comp., 196 (1993), 225.
• [3] XUE B., SCHWER H., HULLIGER F., Acta Cryst. C, 50 (1994), 338.
• [4] DÖNNI A., EHLERS G., MALETTA H., FISCHER P., KITAZAWA H., ZOLLIKER M., J. Phys.: Condens Matter., 8 (1996), 11213.
• [5] NUNEZ-REGUEIRO M.D., LACROIX C., CANALS B., Physica C, 282–287 (1997), 1885.
• [6] KAMIOKA K., OYAMADA A., HASHI K., MAEGAWA S., GOTO T., KITAZAWA H., ISIKAWA Y., Physica B, 259–261 (1999), 121.
• [7] HANE S., GOTO T., ABE T., ISIKAWA Y., Physica B, 281–282 (2000), 391.
• [8] DONIACH S., Physica B, 91 (1977), 231.
• [9] TANG J., MATSUSHITA A., KITAZAWA H., MATSUMOTO T., Physica B, 217 (1996), 97.
• [10] BLAHA P., SCHWARZ K., MADSEN G.K.H., KVASNICKA D., LUITZ J., WIEN2k, An Augmented Plane Wave + Local Orbitals Program for Calculatin Crystal Properties, Karlheinz Schwarz, Techn. Universität Wien, Austria, 2001. ISBN 3-9501031-1-2; PERDEW J.P., BURKE K., ERNZERHOF M., Phys. Rev. Lett., 77 (1996), 3865.
• [11] TOUGAARD S., SIGMUND P., Phys. Rev. B, 25 (1982), 4452.
• [12] CORNELIUS A.L., GANGOPADHYAY A.K., SCHILLING J., ASSMUS W., Phys. Rev. B, 55 (1997), 14109.
• [13] GŁOGOWSKI W., ŚLEBARSKI A., Mater. Sci.-Poland, 24 (2006), 551.
• [14] FUGGLE J.C., HILLEBRECHT F.U., ZOLNIEREK Z., LÄSSER R., FREIBURG CH., GUNNARSSON O., SCHÖNHAMMER K., Phys. Rev. B, 27 (1983), 7330.
• [15] DORADZIŃSKI R., SPAŁEK J., Phys. Rev. B, 56 (1997), R14239; ibid. 58 (1998), 3239; for a brief review see: SPAŁEK J., DORADZIŃSKI R., [in:] Magnetism and Electronic Correlations in Local- Moment Systems: Rare Earth Elements and Compounds, M. Donath, P.A. Dowben, W. Nolting, World Scientific, New Jersey, 1998), p. 387; Acta Phys. Polon. A, 96 (1999), 677; 97 (2000), 71.