We associate the incommensurate magnetic structure with the large anomalous Hall response to be the result of the combination of Fermi surface nesting and the Berry curvature associated with Weyl nodes. These electronic structure calculations indicate the presence of nested Fermi surface pockets with nesting wave vectors like the measured magnetic ordering wave vector and the presence of Weyl nodes in proximity to the Fermi surface. We have discovered a large anomalous Hall conductivity that reaches ≈430Ω−1cm−1, implying that it originates from an intrinsic Berry curvature effect stemming from Weyl nodes found in the electronic structure. In this article, we address this controversy by presenting new neutron diffraction data on single crystals of Co1/3NbS2 and an analysis that implies that moments in this material order into a non-collinear configuration, but one that maintains the same refelction symmetries as the collinear phase. The magnetic structure is complex in that it involves two magnetic ordering vectors, including an incommensurate spin density wave and commensurate ferrimagnetic state in zero field. Cao came to Oak Ridge National Laboratory (ORNL) to work on the HB-3A, a four-circle single crystal neutron diffractometer at High Flux Isotope Reactor (HFIR). Figure 1a shows the diffraction geometry for a single stationary crystal setting. The magnetization and MR measurements are both highly anisotropic and indicate an Ising-like magnetic system. The high-intensity time-of-flight (TOF) neutron diffractometer POWTEX for powder and texture analysis is currently being built prior to operation in the eastern guide hall of the research reactor FRM II at Garching close to Munich, Germany. Scientists and users at Oak Ridge National Laboratory use neutron scattering (diffraction) to observe and understand how the atomic-level magnetism and structure of materials correlates to their properties, which can lead to the development of new functional materials with highly desirable structures and properties as well as a deeper understand. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge. The magnetic structure, magnetoresistance (MR), and Hall effect of the noncentrosymmetric magnetic semimetal NdAlGe are investigated, revealing an unusual magnetic state and anomalous transport properties that are associated with the electronic structure of this compound. The magnetic structure, magnetoresistance (MR), and Hall effect of the noncentrosymmetric magnetic semimetal NdAlGe are investigated, revealing an unusual magnetic state and anomalous transport properties that are associated with the electronic structure of this compound.
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