Analysis of magnetic neutron-scattering data of two-phase ferromagnets

TL;DR

This paper analyzes magnetic-field-dependent small-angle neutron scattering data of two-phase ferromagnets using a micromagnetic theory to extract key magnetic parameters like exchange stiffness and interface magnetization jumps.

Contribution

It applies a recent micromagnetic theory to experimental SANS data, providing new insights into the magnetic properties of two-phase ferromagnets.

Findings

Estimated average exchange-stiffness constant.

Determined Fourier coefficients of magnetic anisotropy and magnetostatic fields.

Linked magnetostatic field to magnetization jumps at interfaces.

Abstract

We have analyzed magnetic-field-dependent small-angle neutron scattering (SANS) data of soft magnetic two-phase nanocomposite ferromagnets in terms of a recent micromagnetic theory for the magnetic SANS cross section [D. Honecker and A. Michels, Phys. Rev. B $\mathbf{87}$, 224426 (2013)]. The approach yields a value for the average exchange-stiffness constant and provides the Fourier coefficients of the magnetic anisotropy field and magnetostatic field, which is related to jumps of the magnetization at internal interfaces.