Magnetization reversal in Nd-Fe-B based nanocomposites as seen by magnetic small-angle neutron scattering
| Autor: | Andreas Michels, Rainer Birringer, Jens-Peter Bick, Ralf Schweins, Joachim Kohlbrecher, E. M. Forgan, Jorge L. Gavilano, Frank Döbrich, Kiyonori Suzuki, Henrich Frielinghaus, Peter Lindner, Dirk Honecker, Elliot P. Gilbert |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) magnetic structure Neutron diffraction Physics [G04] [Physical chemical mathematical & earth Sciences] Field dependence Neutron scattering neodymium alloys Nuclear magnetic resonance neutron diffraction nanocomposites ddc:530 coercive force nanomagnetics boron alloys Spin-½ iron alloys magnetic particles Magnetic structure Condensed matter physics Coercivity Small-angle neutron scattering crystal microstructure Physique [G04] [Physique chimie mathématiques & sciences de la terre] magnetisation reversal Magnetic nanoparticles nanoparticles |
| Zdroj: | Applied physics letters 102(2), 022415-(2013). doi:10.1063/1.4776708 |
| DOI: | 10.1063/1.4776708 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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