Haraldur Gunnlaugsson
(Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Århus C, Denmark)
20/11/2009, 09:00
Semiconductors, which are ferromagnetic at room temperature, are strived after as potential multifunctional materials. For ZnO, room temperature ferromagnetism has been achieved by doping with 3d transition metals making potential dilute magnetic semiconductors. However, contradicting results have been obtained and neither the conditions for, nor the origin of the magnetism are as yet...
Vítor Amaral
(Departamento de Física e CICECO, Universidade de Aveiro)
20/11/2009, 09:30
The search for new systems that exhibit simultaneous ferroelectric and ferromagnetic orders have recently motivated Physic and Materials Science scientific communities to a meticulous research, that beyond searching the simultaneous electric and magnetic orders also have as an objective the maximization of its coupling. These materials offer the possibility to manipulate electrically the...
Ulrich Wahl
(Instituto Tecnológico e Nuclear ITN)
20/11/2009, 09:50
During the SiC-W RILIS Mg run in September 2009 we managed to do first on-line emission channeling lattice location experiments using 27Mg (9.46 min) implanted into GaN and AlN. The room-temperature as-implanted beta- emission channeling patterns showed that the large majority of ion implanted Mg is incorporated on Ga or Al sites. While the detailed analysis of this experiment by means of...
Thomas Wichert
(Technische Physik, Universität des Saarlandes)
20/11/2009, 10:10
It has been shown that the presence of an external Cd pressure effects the formation of so-called uphill diffusion profiles in CdTe around 800 K. This surprising diffusion behavior has meanwhile been demonstrated for the elements Ag, Cu, Au, and Na in radiotracer experiments using suited isotopes delivered by ISOLDE [1,2,3]. It has also turned out that uphill diffusion can also be initialized,...