[Zurück]

H. Michor, E. Bauer, C. Dusek, G. Hilscher, P. Rogl, B. Chevalier, J. Etourneau, G. Giester, U. Killer, E. Scheidt:
"Heavy-fermion quantum critical point behavior in CeNi₉Ge₄";
Journal of Magnetism and Magnetic Materials, 272 - 276 (2004), S. 227 - 228.

Heavy-fermion quantum critical point behavior in CeNi9Ge4

H. Michor [Corresponding Author Contact Information] , [E-mail The Corresponding Author] , a, E. Bauera, C. Duseka, G. Hilschera, P. Roglb, B. Chevalierc, J. Etourneauc, G. Giesterd, U. Killere and E. -W. Scheidte

a Institut für Festkörperphysik, Technische Universität Wien, Wiedner Hauptstr. 8-10, Wien A-1040, Austria
b Institut für Physikalische Chemie, Universität Wien, Wien A-1090, Austria
c Universite de Bordeaux I, Pessac 33608, Cedex, France
d Institut für Mineralogie und Kristallographie, Universität Wien, Wien A-1090, Austria
e Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, Augsburg D-86135, Germany

Available online 11 January 2004.


Abstract

We report on non-Fermi liquid features observed for CeNi9Ge4 ?a novel stoichiometric compound, which is close to the heavy-fermion quantum critical point. The specific heat measured down to 80 mK reveals an almost logarithmic divergence of the low-temperature contribution yielding an extraordinarily large Sommerfeld value [small gamma, Greek] exceeding 6 J/mol K2. The application of external magnetic fields recovers a conventional Fermi-liquid state.

Author Keywords: Ternary compounds; Quantum critical point; Specific heat

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04970051

http://dx.doi.org/10.1016/j.jmmm.2003.12.675