title: Hyperfine interaction studies with (181)Ta and (111)Cd probes in the compound Ti(2)Ag.
abstract: By using the time-differential perturbed angular correlation technique, the electric field gradients (EFG) at (181)Hf/(181)Ta and (111)In/(111)Cd probe sites in the MoSi(2)-type compound Ti(2)Ag have been measured as a function of temperature in the range from 24 to 1073 K. Ab initio EFG calculations have been performed within the framework of density functional theory using the full-potential augmented plane wave+local orbitals method as implemented in the WIEN2k package. These calculations allowed assignments of the probe lattice sites. For Ta, a single well-defined EFG with very weak temperature dependence was established and attributed to the [4(e)4mm] Ti site. For (111)Cd probes, two of the three measured EFGs are well defined and correlated with substitutional lattice sites, i.e. both the [4(e)4mm] Ti site and the [2(a)4/mmm] Ag site.
authors.affiliation: Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland. II Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Kulińska
authors.forename: P
authors.initials: P
authors.lastname: Wodniecki
authors.forename: B
authors.initials: B
authors.lastname: Wodniecka
authors.forename: H M
authors.initials: HM
authors.lastname: Petrilli
authors.forename: L A
authors.initials: LA
authors.lastname: Terrazos
authors.forename: M
authors.initials: M
authors.lastname: Uhrmacher
authors.forename: K P
authors.initials: KP
authors.lastname: Lieb