Transition from Mixed-Valence to Trivalent Cerium State in Ce(Ni,Cu)Al Series

• Authors: P. Čermák , P. Javorský , E. Šantavá
• Languages of publication: EN

Abstracts

EN

In this work we present the study of the part of Ce(Ni,Cu)Al series from the pure CeNiAl to 30% of copper concentration, which illustrates the transition from mixed-valence state of CeNiAl to the trivalent state in CeCuAl. The work is based on X-ray diffraction, magnetization and specific heat measurement. The results indicate smooth transition between the mixed-valence and trivalent cerium state. The specific-heat data reveal increase of the Sommerfeld γ coefficient with copper concentration.

Keywords

EN

75.40.Cx; 75.30.Mb

Discipline

• 75.40.Cx: Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
• 75.30.Mb: Valence fluctuation, Kondo lattice, and heavy-fermion phenomena(see also 71.27.+a Strongly correlated electron systems, heavy fermions; for heavy-fermion superconductors, see 74.70.Tx)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 926-928

Dates

published

2010-11

Contributors

author

P. Čermák

• Charles University in Prague, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Ke Karlovu 5, 121 16 Prague 2, Czech Republic

author

P. Javorský

• Charles University in Prague, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Ke Karlovu 5, 121 16 Prague 2, Czech Republic

author

E. Šantavá

• Institute of Physics AS CR, v. v. i., Na Slovance 2, 182 21 Prague 8, Czech Republic

References

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• 3. N.C. Tuan, Ph.D. Thesis, Prague 1992
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• 5. H. Oesterreicher, J. Less-Common Met. 30, 225 (1973)
• 6. G. Cordier, G. Dörsam, R. Kniep, J. Magn. Magn. Mater. 76-77, 653 (1988)
• 7. P. Čermák, H. Kitazawa, J. Prchal, P. Javorský, J. Phys., Condens. Matter 22, 126002 (2010)

Identifiers

DOI

10.12693/APhysPolA.118.926