Claus Urban

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Given the paucity of single phase multiferroic materials (with large ferromagnetic moment), composite systems seem an attractive solution to realize magnetoelectric coupling between ferromagnetic and ferroelectric order parameters. Despite having antiferromagnetic order, BiFeO3 (BFO) has nevertheless been a key material due to excellent ferroelectric(More)
The realization of a controllable metamagnetic transition from AFM to FM ordering would open the door to a plethora of new spintronics based devices that, rather than reorienting spins in a ferromagnet, harness direct control of a materials intrinsic magnetic ordering. In this study FeRh films with drastically reduced transition temperatures and a large(More)
We present a comparison for high-resolution imaging with a laboratory source between grating-based (GBI) and propagation-based (PBI) x-ray phase-contrast imaging. The comparison is done through simulations and experiments using a liquid-metal-jet x-ray microfocus source. Radiation doses required for detection in projection images are simulated as a function(More)
Linear, rotary and 2D optical, absolute position encoder principle combines several competitive features such as sub-nanometric resolution over practically infinite range, up to 1 MHz sampling rate, compact design, optic-less imaging and robustness. As an example, a linear encoder with standard, VGA-size image sensor can reach 60-bits dynamic range, which(More)
Uytterhoeven, «Angular overlap calculations of spin hamiltonian parameters of transition metal ions in low symmetry environments. High spin iron(II) and manganese(III)».INORG. A. Daul, «Density Functional description of the ferromagnetic exchange interactions between semiquinonate radicals mediated by diamagnetic metal ions». Functional Modelling of Double(More)
A new sample environment has been developed in order to perform light and small-angle neutron scattering (SANS) simultaneously on colloidal systems. The combination of SANS and diffusing wave spectroscopy (DWS) is of particular use in the high-concentration regime. DWS provides information on the local dynamic properties of the individual particles, whereas(More)
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