Three-dimensional magnetic spin-echo small-angle neutron scattering and neutron depolarization: A comparison

The recently developed magnetic spin-echo small-angle neutron scattering (SANS) technique provides unique information about the distance correlation of the local vector magnetization as a function of the spin-echo length within a magnetic material. The technique probes the magnetic correlations on a...

Full description

Saved in:
Bibliographic Details
Published in:Review of scientific instruments 2006-07, Vol.77 (7)
Main Authors: Rekveldt, M. Theo, van Dijk, Niels H., Grigoriev, Serguei V., Kraan, Wicher H., Bouwman, Wim G.
Format: Article
Language:English
Subjects:
COMPARATIVE EVALUATIONS
DEPOLARIZATION
INDUCTION
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
LARMOR PRECESSION
MAGNETIC MATERIALS
MAGNETIZATION
NEUTRON BEAMS
NEUTRON DIFFRACTION
NEUTRONS
SMALL ANGLE SCATTERING
SPIN ECHO
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The recently developed magnetic spin-echo small-angle neutron scattering (SANS) technique provides unique information about the distance correlation of the local vector magnetization as a function of the spin-echo length within a magnetic material. The technique probes the magnetic correlations on a length scale from 10 nm up to 10 μ m within the bulk of a magnetic material by evaluating the Larmor precession of a polarized neutron beam in a spin-echo setup. The characteristics of the spin-echo SANS technique are discussed and compared to those of the more conventional neutron depolarization technique. Both of these techniques probe the average size of the magnetic inhomogeneities and the local magnetic texture. The magnetic spin-echo SANS technique gives information on the size distribution of these magnetic inhomogeneities perpendicular to the beam and, in principle, independent on the local magnetic induction. This information is not accessible by the neutron depolarization technique that gives the average size parallel to the beam multiplied with the square of the local magnetic induction. The basic possibilities of the magnetic spin-echo SANS technique are demonstrated by experiments on samples with a strong magnetic texture.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.2204579