Description
Chair: Dr Carlos Pineda-Vargas
Prof.
Krishanlal Bharuth-Ram
(University of KwaZulu-Natal)
04/12/2013, 11:10
Oral
The hyperfine interactions between the magnetic dipole and electric quadrupole moments of probe nuclei embedded in condensed matter have been utilized for many years to infer information either on the properties of the probe nuclei or of the matrix in which they are located [1]. These hyperfine interactions have led to development of interrogation techniques which allow the study of effects at...
Dr
Deena Naidoo
(School of Physics, University of the Witwatersrand, Private Bag 3, WITS, 2050)
04/12/2013, 11:45
Oral
Oxides, in particular ZnO doped with 3d-metal impurities has been of scientific interest since the suggestion that it could be a magnetic semiconductor with applications in spintronics [1]. 57Fe Mössbauer spectroscopy is a powerful method to determine the properties of the probe atoms, giving simultaneously information on the charge/spin state, site symmetry and on magnetic interactions. In...
Dr
Ulrich Wahl
(IST/ITN, Instituto Superior Tecnico, Universidade de Lisboa)
04/12/2013, 12:10
Oral
Emission channeling (EC) relies on implanting single crystals with radioactive probe atoms that decay by the emission of charged particles such as alpha, beta- or beta+ particles or conversion electrons, which, on their way out of the crystal, experience channeling or blocking effects along crystallographic axes and planes. The resulting anisotropic particle emission yield from the crystal...
