Poster

Neutrons are scattered from the nuclei and x-rays are scattered from the electrons of the atoms in a protein crystal. This renders these two scattering probes as being complementary to each other. [...]

Neutron protein crystallography requires a highly brilliant beam in order to measure very small biological single crystals, which typically measure between 0.01 and 1 mm³. Additionally, these crystals have a large unit cell size, which may be as large as 200 Å in at least one dimension. [...]

We present the hot neutron two-axis diffractometer POLI, which uses spin-polarized neutrons for magnetic studies in particular. We give an overview on the capabilities as well as recent upgrades of the instrument..

Magnetic rare-earth ortheferrites of the REFeO3 type (RE = rare earth element) are model systems for studies and theoretical considerations on magnetic structures in sixties of the last century [e.g. Ber68], have regained significant interest in the last decade [...]

Rare-earth orthoferrites, RFeO₃(R=rare earth element), have been model systems for studies and theoretical considerations of magnetic structures since the 1960s [Whi69]. They have regained considerable interest in the last decade due to their complex multiferroic properties, which make them potential candidates for modern applications, e.g. [...]

Lattice relaxation, i.e. small lattice symmetry lowering, could lead to unresolved peak splitting in powder diffraction, which results in anisotropic, i.e. [...]

Lattice relaxation, i.e. small lattice symmetry lowering, could lead to unresolved peak splitting in powder diffraction, which results in anisotropic, i.e. [...]

POLI is a hot neutron two-axis diffractometer at the Heinz Maier-Leibnitz Zentrum (MLZ), Germany, which uses spin-polarized neutrons for magnetic studies in particular. The instrument is used, for instance, to study complex crystal and magnetic structures, to reconstruct magnetization densities in the unit cell, and to explore phase diagrams of materials via multiparameter studies. [...]

Structurally, the mineral clinoatacamite Cu$_2$Cl(OH)$_3$ is closely related to the kagome material herbertsmithite Zn$_3$CuCl$_2$(OH)$_6$. In clinoatacamite, however, the kagome motif of Cu sites is embedded into a low-symmetry crystal structure, which causes a distortion of the kagome plane as well as different site symmetries for the kagome Cu sites. [...]