Inelastic neutron scattering from the superconducting heavy-fermion compound UBe13 and the reference system ThBe13

✍ Scribed by F. Gompf; B. Renker; H. Rietschel; N. Nücker; J. Beuers

• Publisher: Elsevier Science
• Year: 1985
• Weight: 320 KB
• Volume: 135
• Category: Article
• ISSN: 0378-4363
• DOI: 10.1016/0378-4363(85)90430-9

✦ Synopsis

We present results of inelastic neutron-scattering on polycrystalline samples of the heavy-fermion compound UBe~3 and for ThBe13 as a reference system. We analyze these data on the basis of a Born-von-Kfirmfin model. Our results give clear evidence for the existence of an Einstein-mode-like oscillator around 13 meV for both compounds, independently of temperature. From our deduced phonon density of states, we calculate the lattice contribution to the low-temperature heat capacity. It is found to be small compared to the total specific heat measured for UB%3.