Search results for "SBTE"
showing 2 items of 2 documents
From local structure to nanosecond recrystallization dynamics in AgInSbTe phase-change materials
2010
Phase-change optical memories are based on the astonishingly rapid nanosecond-scale crystallization of nanosized amorphous 'marks' in a polycrystalline layer. Models of crystallization exist for the commercially used phase-change alloy Ge(2)Sb(2)Te(5) (GST), but not for the equally important class of Sb-Te-based alloys. We have combined X-ray diffraction, extended X-ray absorption fine structure and hard X-ray photoelectron spectroscopy experiments with density functional simulations to determine the crystalline and amorphous structures of Ag(3.5)In(3.8)Sb(75.0)Te(17.7) (AIST) and how they differ from GST. The structure of amorphous (a-) AIST shows a range of atomic ring sizes, whereas a-GS…
Observed teaching practices interpreted from the perspective of school-based teacher educators
2021
A teacher supervising the school practice of student teachers is regarded as an expert who sets an example of good teaching to future teachers and chooses teaching practices that support pupils’ cognitive and social development. This study examines the implementation of teaching practices and the interpretation of these practices by school-based teacher educators who supervise school practice of student teachers at universities’ innovation schools. Teaching practices were examined using observation and video-stimulated recall interviews. The school-based teacher educators widely used and described in detail individual teaching practices that supported pupils’ cognitive development. However,…