Conveners
Solid State Physics
- Krish Bharuth-Ram (University of KwaZulu-Natal)
Prof.
Purushottam Chakraborty
(Saha Institute of Nuclear Physics)
19/12/2012, 09:00
Invited
Excellent detection sensitivity, high dynamic range and good depth resolution make the secondary ion mass spectrometry (SIMS) extremely powerful for the analysis of surfaces and interfaces of materials. However, a serious problem in SIMS analysis is its ‘‘matrix effect’’ that hinders the materials quantification. Realistic SIMS quantification having analytical accuracy better than ±20%...
Karl Johnston
(Universitaet des Saarlandes (DE))
19/12/2012, 09:30
Submitted
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]. Since then, inconsistent reports on the presence of dilute magnetism have been published, with only few reports using local atomic probe methods such as Mössbauer spectroscopy. In our previous work utilizing emission Mössbauer...
Dr
Lino M. C. Pereira
(Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium.)
19/12/2012, 09:45
Submitted
The coexistence of semiconducting behavior and ferromagnetic order in dilute magnetic semiconductors (DMS) continue to challenge our understanding of condensed matter [1,2]. For a given impurity-host combination, the electrical and magnetic properties are largely determined by the lattice sites occupied by the dopant atoms. The canonical example is Mn-doped GaAs (narrow-gap), where...
Manfred Deicher
(Experimentalphysik, Universität des Saarlandes, 66123 Saarbrücken, Germany)
19/12/2012, 10:05
Submitted
Radiotracer experiments are the most sensitive tool for the study of diffusion phenomena in solids. At ISOLDE/CERN diffusion experiments have been performed using the unique diversity of radiotracers delivered for implantation by ISOLDE.
It has been shown that in CdTe the group I elements Cu, Ag, Au, and Na can exhibit the phenomenon of uphill diffusion, which under suitable conditions...
Juliana Marques Ramos
(University of São Paulo)
19/12/2012, 10:20
Submitted
Fe-doped thin films of the semiconductors SnO2 and TiO2 have been measured by means of the perturbed angular correlation spectroscopy (PAC) in order to investigate the ferromagnetism and to study the electric quadrupole interactions. Important technological applications of these oxides [1,2], especially as candidates for diluted magnetic semiconductor [3] in the emerging area of...
