MAGNETIC, TRANSPORT AND MOSSBAUER-EFFECT STUDY OF UFEAL

We present the results of magnetic susceptibility, electrical resistiv ity and Mossbauer effect measurements performed on two crystallographi c structures of UFeAl: high-temperature (HT) and low-temperature (LT) phases, i.e. MgZn2- and Fe2P-type structures respectively. The exchang e-enhanced Pauli susceptibility and spin-fluctuation characteristics o f the temperature dependence of the electrical resistivity of UFeAl ar e almost independent of the type of crystal structure. Fe-57 Mossbauer spectra of both crystallographic phases of UFeAl, recorded in the tem perature range 10-295 K, consist of two symmetric quadrupole doublets for each crystal structure associated with the non-equivalent crystall ographic positions of Fe. The Debye temperatures for the HT and LT str uctures of UFeAl were also estimated.