Mössbauer studies on LaNi4.7Sn0.3 and its hydride

Abstract

Mössbauer measurements were made on LaNi4.7Sn0.3 at room and liquid nitrogen temperatures. Experimental data yielded a singlet at room temperature and a doublet at liquid nitrogen temperature. Spectra of the hydrided sample yielded a doublet at liquid nitrogen temperature with an increase in the quadrupole splitting compared to the unhydrided spectra, but no change in the isomer shift. These data indicate that there is no significant interaction between the tin and the hydrogen. The magnetic character remained the same down to liquid nitrogen temperature as evidenced by the Mössbauer data. X-ray diffraction measurements on the hydride showed an expanded lattice with the same structure as found for the unhydrided sample. A decrease in particle size was observed upon hydriding.