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2024-02-21
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2023-12-10
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2023-11-17
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2023-11-15
20:02
OpenAccess [FZJ-2023-04460] Journal Article
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Topological magnons driven by the Dzyaloshinskii-Moriya interaction in the centrosymmetric ferromagnet Mn5Ge3
The phase of the quantum-mechanical wave function can encode a topological structure with wide-ranging physical consequences, such as anomalous transport effects and the existence of edge states robust against perturbations. While this has been exhaustively demonstrated for electrons, properties associated with the elementary quasiparticles in magnetic materials are still underexplored. [...]
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2023-11-04
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2023-10-01
20:01
OpenAccess [FZJ-2023-03673] Journal Article
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Simultaneous SANS/FTIR measurement system incorporating the ATR sampling method
Small-angle neutron scattering (SANS) is widely used as a powerful technique to study the higher-order structure of soft matter. To increase the reliability of SANS profile analysis for complex multi-component systems, combining different types of structural information obtained by other methods is desirable. [...]
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2023-08-30
11:28
OpenAccess [FZJ-2023-03207] Journal Article
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Interchain Hydrodynamic Interaction and Internal Friction of Polyelectrolytes
ACS Macro Letters 12(XXX), 1218 - 1223 () [10.1021/acsmacrolett.3c00409]
Polyelectrolytes (PE) are polymeric macromolecules in aqueous solutions characterized by their chain topology and intrinsic charge in a neutralizing fluid. Structure and dynamics are related to several characteristic screening length scales determined by electrostatic, excluded volume, and hydrodynamic interactions. [...]
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2023-08-20
11:28
OpenAccess [FZJ-2023-02640] Journal Article
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An overview of the spin dynamics of antiferromagnetic Mn5Si3
APL materials 11(8), 081103 () [10.1063/5.0156028]
The metallic compound Mn5Si3 hosts a series of antiferromagnetic phases that can be controlled by external stimuli, such as temperature and magnetic field. In this work, we investigate the spin-excitation spectrum of bulk Mn5Si3 by combining inelastic neutron scattering measurements and density functional theory calculations. [...]
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2023-08-18
11:28
OpenAccess [FZJ-2023-02866] Journal Article
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Extended Q -range small-angle neutron scattering to understand the morphology of proton-exchange membranes: the case of the functionalized syndiotactic-polystyrene model system
Semi-crystalline polymers exhibit microphase separation into crystalline and amorphous domains characterized by multiple structural levels with sizes ranging from ångströms to hundreds of nanometres. The combination of small-angle (SANS) and wide-angle (WANS) neutron scattering on the same beamline enables reliable in situ characterization of such materials under application-relevant conditions, with the unique advantage of contrast variation by controlled labelling, allowing the structure of such multi-component systems to be resolved in detail. [...]
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