Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Magnetic measurement methods

MA 15.1: Vortrag

Dienstag, 17. März 2015, 09:30–09:45, H 1012

Magnetic SANS correlation functions of bulk ferromagnets — •Denis Mettus and Andreas Michels — Physics and Materials Science Research Unit, University of Luxembourg

Small-angle neutron scattering (SANS) is a very powerful method for structure determination which can be utilized in a wide range of scientific disciplines such as material science, physics, or chemistry. For bulk ferromagnets, the magnetic neutron scattering cross section is usually dominated by the so-called spin-misalignment scattering, which is related to the transversal magnetization Fourier coefficients. In this talk, we discuss model computations (based on the continuum theory of micromagnetics) for the magnetic correlation function of bulk ferromagnets. Specifically, we provide results for the magnetic correlation function of bulk ferromagnets as a function of applied magnetic field, particle volume fraction, and magnetic-interaction parameters (exchange constant, magnetic anisotropy field, magnetostatic field due to magnetization jumps at internal interfaces).