Browse ORBilu by Open Access
- What it is and what it isn't
- Green Road / Gold Road?
- Ready to Publish. Now What?
- How can I support the OA movement?
- Where can I learn more?
ORBilu is a project developed by
Showing results 41 to 60 of 153
   Small-angle neutron scattering study of coercivity enhancement in grain-boundary-diffused Nd-Fe-B sintered magnets; Titov, Ivan  ; et alin Journal of Alloys & Compounds (2016), 677 Detailed reference viewed: 80 (1 UL)Magnetic neutron scattering studies on Nd-Fe-B magnetsMichels, Andreas Presentation (2015, December 14) Detailed reference viewed: 27 (1 UL)Anisotropic magnetic correlations in nanocompositesMichels, Andreas Scientific Conference (2015, September 14) Detailed reference viewed: 31 (3 UL) Excitation of Ni nanorod colloids in oscillating magnetic fields: a new approach for nanosensing investigated by TISANE; Günther, Annegret ; Honecker, Dirk et alin Nanoscale (2015), 7 The response of a colloidal dispersion of Ni nanorods to an oscillating magnetic field was characterized by optical transmission measurements as well as small-angle neutron scattering (SANS) experiments ... [more ▼] The response of a colloidal dispersion of Ni nanorods to an oscillating magnetic field was characterized by optical transmission measurements as well as small-angle neutron scattering (SANS) experiments using the TISANE (Time-dependent SANS experiments) technique. Exposed to a static magnetic field, the scattering intensity of the rod ensemble could be well described by the cylinder form factor using the geometrical particle parameters (length, diameter, orientation distribution) determined by transmission electronmicroscopy and magnetometry. An oscillation of the field vector resulted in a reorientation of the nanorods and a time-dependency of the scattering intensity due to the shape anisotropy of the rods. Analysis of the SANS data revealed that in the range of low frequencies the orientation distribution of the rods is comparable to the static case. With increasing frequency, the rod oscillation was gradually damped due to an increase of the viscous drag. It could be shown that despite of the increased friction in the high frequency range no observable change of the orientation distribution of the ensemble with respect to its symmetry axis occurs. [less ▲] Detailed reference viewed: 86 (7 UL)Magnetic SANS correlation functions of bulk magnetic materialsMettus, Denis ; Michels, Andreas Poster (2015, September 02) We present model calculations, based on the continuum theory of micromagnetics, for the correlation function of the spin-misalignment SANS cross section of bulk ferromagnets (e.g. elemental ... [more ▼] We present model calculations, based on the continuum theory of micromagnetics, for the correlation function of the spin-misalignment SANS cross section of bulk ferromagnets (e.g. elemental polycrystalline ferromagnets, soft and hard magnetic nanocomposites, nanoporous ferromagnets, or magnetic steels). For such materials, the spin disorder which is related to spatial variations in the saturation magnetization and magnetic anisotropy field results in strong spin-misalignment scattering dΣM/dΩ along the forward direction [1]. When the applied magnetic field is perpendicular to the incoming neutron beam, the characteristics of dΣM/dΩ (e.g. the angular anisotropy on a two-dimensional detector or the asymptotic power-law exponent) are determined by the ratio of magnetic anisotropy-field strength Hp to the jump ΔM in the saturation magnetization at internal interfaces. Here, we analyze the corresponding one and two-dimensional real-space correlations as a function of applied magnetic field, ratio Hp/ΔM, single-particle form factor, and particle volume fraction. Finally, we compare the theoretical results for the correlation function to experimental data on a Nd-Fe-B-based nanocomposite. [less ▲] Detailed reference viewed: 48 (2 UL)Magnetic neutron scattering studies on Nd-Fe-B magnetsMichels, Andreas Scientific Conference (2015, September) Detailed reference viewed: 34 (4 UL)Magnetic small-angle neutron scattering: beyond the particle-matrix conceptMichels, Andreas Poster (2015, September) Detailed reference viewed: 41 (2 UL)Dipolar spin-misalignment correlations in inhomogeneous magnets: Comparison between neutron scattering and micromagnetic; ; Michels, Andreas in Physical Review. B : Condensed Matter (2015), 92(1), 014427 In inhomogeneous bulk ferromagnets, the dominating sources of spin disorder are related to spatial variations of (i) the magnitude of the local saturation magnetization and of (ii) the magnitude and/or ... [more ▼] In inhomogeneous bulk ferromagnets, the dominating sources of spin disorder are related to spatial variations of (i) the magnitude of the local saturation magnetization and of (ii) the magnitude and/or direction of the magnetic anisotropy field. For the particular example of a porous ferromagnet, where the magnetization inhomogeneity is at maximum, we demonstrate, by means of experimental neutron scattering data and micromagnetic simulations, the anisotropic character of magnetization fluctuations induced by the dipolar interaction. [less ▲] Detailed reference viewed: 48 (0 UL)Comment on “Origin of Surface Canting within Fe3O4 Nanoparticles”Michels, Andreas ; ; et alin Physical Review Letters (2015), (114), 149701 Detailed reference viewed: 84 (2 UL)Synthesis and magnetic properties of Ta/NdFeB-based composite microwires; ; et al in Journal of Applied Physics (2015), 117 Detailed reference viewed: 97 (9 UL)Magnetic SANS study of a sintered Nd–Fe–B magnet: Estimation of defect sizePerigo, Elio Alberto ; ; Michels, Andreas in Acta Materialia (2015), 87 Detailed reference viewed: 114 (11 UL)Small-angle neutron scattering correlation functions of bulk magnetic materialsMettus, Denis ; Michels, Andreas in Journal of Applied Crystallography (2015), 48 Detailed reference viewed: 126 (5 UL)Third-order effect in magnetic small-angle neutron scattering by a spatially inhomogeneous medium; Michels, Andreas in Physical Review. B, Condensed Matter and Materials Physics (2015), 91 Detailed reference viewed: 103 (9 UL)Small-angle neutron scattering of nanocrystalline gadolinium and holmium with random paramagnetic susceptibility; ; et al in Journal of Physics : Condensed Matter (2015), 27 Detailed reference viewed: 133 (5 UL)Magnetic small-angle neutron scattering of bulk ferromagnets: beyond the particle-matrix conceptMichels, Andreas Scientific Conference (2015) Detailed reference viewed: 35 (3 UL)Magnetic small-angle neutron scattering of bulk ferromagnets: beyond the particle-matrix conceptMichels, Andreas Presentation (2014, December 03) Detailed reference viewed: 29 (0 UL)Field-Induced Spin Helix Chirality in Nanocrystalline HoSzary, Philipp ; Bick, Jens-Peter ; Kaiser, Daniel et alPoster (2014, November) Detailed reference viewed: 67 (16 UL)Magnetic properties of Ta/NdFeB core-shell microwiresSzary, Philipp ; ; et alPoster (2014, November) Detailed reference viewed: 65 (8 UL)Magnetic small-angle neutron scattering of bulk ferromagnetsMichels, Andreas in Journal of Physics : Condensed Matter (2014), 26 Detailed reference viewed: 101 (3 UL)SANS on magnetic nanostructuresMichels, Andreas Scientific Conference (2014, June 29) Detailed reference viewed: 126 (4 UL) |
||
