Crystal field studies on the heavy fermion compound CeNi$_8$CuGe$_4$
| Autor: | Peyker, L, Gold, C, Scheidt, E-W, Michor, H, Unruh, T, Senyshyn, A, Stockert, O, Scherer, W |
|---|---|
| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Journal of Physics: Conference Series 200 (2010) 012160 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1742-6596/200/1/012160 |
| Popis: | Substitution of nickel by copper in the heavy fermion system CeNi$_{9-x}$Cu$_x$Ge$_4$ alters the local crystal field environment of the Ce$^{3+}$-ions. This leads to a quantum phase transition near $x\approx0.4$, which is not only driven by the competition between Kondo effect and RKKY interaction, but also by a reduction of an effectively fourfold to a twofold degenerate crystal field ground state. To study the consequences of a changing crystal field in CeNi$_8$CuGe$_4$ on its Kondo properties, inelastic neutron scattering (INS) experiments were performed. Two well-defined crystal field transitions were observed in the energy-loss spectra at 4 K. The crystal field level scheme determined by neutron spectroscopy is compared with results from specific heat measurements. Comment: 4 pages, 3 figures, conference SCES09 |
| Databáze: | arXiv |
| Externí odkaz: |
|