Magnetic Structure of La0.54Ho0.11Sr0.35Mn1-XCuxO3 Manganites

New La0.54Ho0.11Sr0.35Mn1-xCuxO3 manganites were obtained by sol-gel method using oxides and acetates and sintered finally in air at 12000 C for 15 h. The samples were studied by X-ray diffraction, magnetic and electric methods. Space group, lattice constants, average size of the crystalline blocks and positions of cations/anions in the unit cell, were determined using the FullProf code. The samples contain only a perovskite phase with an orthorhombic structure (Pnma space group). Small-angle neutron scattering (SANS) measurements were performed on the SANS-1 setup at the FRG-1 reactor of the GKSS Research Centre (Geesthacht, Germany). The sizes of magnetic clusters have been determined at room temperature.

High-Resolution X-Ray Computed Tomography for Materials Research

Nowadays, X-ray tube-based high-resolution CT systems are widely used in scientific research and industrial applications. But the potential, convenience and economy of these lab systems is often underestimated. The present paper shows the comparison of sophisticated conventional µCT with synchrotron radiation-based µCT (SRµCT). The tube-based µCT measurements were performed with a granite-based phoenix nanotom®-CT system (GE Sensing & Inspection Technologies, Wunstorf, Germany) equipped with a 180 kV, 15 W high-power nanofocus tube with tungsten or molybdenum targets. This X-ray tube opens a wide range of applications from scanning low absorbing samples in nanofocus mode with voxel sizes below 500 nm to scanning highly absorbing objects in the high power mode with focal spot and voxel sizes of a few microns. The SRµCT measurements were carried out with the absorption contrast set-up at the beamlines W 2 and BW 2 at HASYLAB/DESY, operated by the GKSS Research Centre.

Imaging Diffraction Using Maxim at G3/Hasylab - Spatial Resolved Strain Measurements on Linear Friction Welded Dissimilar Materials (AA7020-T6/Ti6AlV

Strain induced by friction welding of dissimilar materials was determined by an imaging diffraction technique using the Material X-ray diffraction Imaging (MAXIM) detector at HASYLAB G3. Applying the sin2Ψ method in ω mode, a stress profile perpendicular to the weld joint was derived. Results are discussed and compared with measurements of the same specimen made at the neutron source of the GKSS Research Centre.