Abstract Two new phases Th4Fe13Sn5 and ThFe0.22Sn2 have been studied by 57Fe and 119Sn Mössbauer spectroscopy. The 57Fe Mössbauer spectra of Th4Fe13Sn5, measured at room temperature and 4.2 K without and with applied magnetic field up to 5.5 T, exhibit four sextets. Our measurements prove that all four Fe sub-lattices are collinear. The 119Sn Mössbauer spectra of Th4Fe13Sn5 show two sextets with different Beff, reflecting the influence of ferromagnetic nn iron atoms. The results obtained from full-potential linear augmented plane wave (LAPW) calculations are in agreement with the experimental data and confirm the assignment of Mössbauer spectra. The Mössbauer data for the ThFe0.22Sn compound prove the existence of two different sites both for Fe and Sn, all having icosahedral co-ordination.
A Mossbauer study of the new phases Th4Fe13Sn5 and ThFe0.22Sn2
PRINCIPI, GIOVANNI;SPATARU, TUDOR;MADDALENA, AMEDEO;
2001
Abstract
Abstract Two new phases Th4Fe13Sn5 and ThFe0.22Sn2 have been studied by 57Fe and 119Sn Mössbauer spectroscopy. The 57Fe Mössbauer spectra of Th4Fe13Sn5, measured at room temperature and 4.2 K without and with applied magnetic field up to 5.5 T, exhibit four sextets. Our measurements prove that all four Fe sub-lattices are collinear. The 119Sn Mössbauer spectra of Th4Fe13Sn5 show two sextets with different Beff, reflecting the influence of ferromagnetic nn iron atoms. The results obtained from full-potential linear augmented plane wave (LAPW) calculations are in agreement with the experimental data and confirm the assignment of Mössbauer spectra. The Mössbauer data for the ThFe0.22Sn compound prove the existence of two different sites both for Fe and Sn, all having icosahedral co-ordination.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
