[Zurück]

C. Seuring, E. Scheidt, E. Bauer:
"Field and pressure response of Yb compounds close to a quantum critical point";
Pramana - Journal of Physics, Vol. 58 (2002), 5 & 6; S. 731 - 736.

Field and pressure response of Yb compounds close to a quantum critical point

C SEURING1, E W SCHEIDT1 and E BAUER2,

1Lehrstuhl f¨ur Experimentalphysik III, Universit¨at Augsburg, D-86159 Augsburg, Germany
2Institut f¨ur Experimentalphysik, TU Wien, A-1040Wien, Austria
Email: Ernst.bauer@xphys.tuwien.ac.at

Abstract
YbCu5xAlx provides the possibility to tune ground state properties by a change of the valence due to the Cu/Al substitution, by pressure as well as by the application of a magnetic field. Near to the critical concentration xcr 1.5 non-Fermi-liquid properties (NFL) are obvious, obeying hyperscaling. If magnetic order sets in for x > 1.5, the application of moderate magnetic fields quenches order and again NFL features become evident. Hyperscaling in this case indicates strongly interacting spin fluctuations.

http://www.ias.ac.in/pramana/mayjune2002/as03.pdf