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H. Michor, D.T. Adroja, E. Bauer, R. Bewley, D. Dobozanov, A.D. Hillier, G. Hilscher, U. Killer, M. Koza, S. Manalo, P. Manuel, M. Reissner, P. Rogl, M. Rotter, E.-W. Scheidt:
"Unusual non-Fermi liquid behavior in CeNi₉Ge₄^*";
Physica B: Condensed Matter, 378-380 (2006), 640 - 643.

Unusual non-Fermi liquid behavior in CeNi₉Ge₄^*

H. Michor a, D.T. Adroja b, E. Bauer a, R. Bewley b, D. Dobozanov a, A.D. Hillier b, G. Hilscher a, U. Killer c, M. Koza d, S. Manalo a, P. Manuel b, M. Reissner a, P. Rogl e, M. Rotter e and E.-W. Scheidt c

a Institut für Festkörperphysik, T.U. Wien, A-1040 Wien, Austria
b ISIS Facility, Rutherford Appleton Laboratory Chilton, Didcot OX11 0QX, UK
c Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, D-86135 Augsburg, Germany
d Institut LaueLangevin, B.P. 156, F-38042, Grenoble Cedex 9, France
e Institut für Physikalische Chemie, Universität Wien, A-1090 Wien, Austria

Available online 28 February 2006.

Abstract

We report on unusual non-Fermi liquid features of the ternary compound CeNi₉Ge₄ which exhibits the largest ever recorded value of the electronic specific heat C/T~=5.5J/mol K² at T=0.08 K in a purely paramagnetic system. The latter is confirmed by μSR measurements down to 30 mK revealing a rather slow simple exponential muon spin depolarisation in zero-field and thus a spatially homogeneous paramagnetic state. The ground state properties and crystal field (CF) splitting of CeNi₉Ge₄ have been studied by specific heat, magnetic susceptibility as well as muon spin relaxation (μSR) and inelastic neutron spectroscopy (INS).

Keywords: Non-Fermi liquid; Muon spin relaxation; Inelastic neutron scattering

PACS classification codes: 71.27.+a; 75.20.Hr; 78.70.Nx

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC05938265

http://dx.doi.org/10.1016/j.physb.2006.01.345