boron alloys; coercive force; crystal microstructure; iron alloys; magnetic particles; magnetic structure; magnetisation reversal; nanocomposites; nanomagnetics; nanoparticles; neodymium alloys; neutron diffraction
Abstract :
[en] We have studied the magnetization-reversal process of a Nd2Fe14B/Fe3B nanocomposite using small-angle neutron scattering. Based on the computation of the autocorrelation function of the spin misalignment, we have estimated the characteristic size lC of spin inhomogeneities around the Nd2Fe14B nanoparticles. The quantity lC approaches a constant value of about 12.5 nm ( ∼ average Nd2Fe14B particle radius) at 14 T and takes on a maximum value of about 18.5 nm at the coercive field of −0.55 T. The field dependence of lC can be described by a model that takes into account the convolution relationship between the nuclear and the magnetic microstructure.
Disciplines :
Physics
Identifiers :
UNILU:UL-ARTICLE-2013-041
Author, co-author :
BICK, Jens-Peter ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
HONECKER, Dirk ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Döbrich, Frank ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Suzuki, Kiyonori; Monash University, Australia
Gilbert, Elliot P.; Bragg Institute, ANSTO, Australia
Frielinghaus, Henrich; Jülich Centre for Neutron Science, Germany
Joachim, Kohlbrecher; Paul Scherrer Institut, Switzerland
Gavilano, Jorge; Paul Scherrer Institut, Switzerland
Forgan, Edward M.; University of Birmingham, United Kingdom
Schweins, Ralf; Institut Laue-Langevin, France
Lindner, Peter; Institut Laue-Langevin, France
Birringer, Rainer; Universität des Saarlandes, Germany
MICHELS, Andreas ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
