Title :
Magnetization Reversal Process in Pr-Cu Infiltrated Nd-Fe-B Nanocrystalline Magnet Investigated by Small-Angle Neutron Scattering
Author :
Ueno, Tomohiro ; Saito, Kazuyuki ; Yano, M. ; Harada, Masaaki ; Shoji, Tomoyuki ; Sakuma, Naoshi ; Manabe, Akira ; Kato, Akira ; Keiderling, Uwe ; Ono, Keishi
Author_Institution :
Elements Strategy Initiative Center for Magn. Mater., Nat. Inst. for Mater. Sci., Tsukuba, Japan
Abstract :
Magnetization reversal process in Nd-Fe-B nanocrystalline magnets was investigated by small-angle neutron scattering (SANS) using a non-polarized neutron beam. The magnetic-field dependence of the SANS intensities was obtained for as-deformed and Pr-Cu infiltrated Nd-Fe-B magnets. The SANS intensity variation with the magnetic field is suppressed in Pr-Cu infiltrated sample as compared with that in as-deformed sample. The isolation of Nd2Fe14B grains along the [001]-axis direction was found to be caused by the infiltration of the Pr-Cu eutectic alloy, resulting in coercive force enhancement. The results suggest that magnetic isolation of the grains is the key to developing magnets with high coercive force.
Keywords :
coercive force; iron compounds; magnetic domains; magnetisation reversal; nanomagnetics; nanostructured materials; neodymium compounds; neutron diffraction crystallography; neutron effects; Nd2Fe14B; PrCu; [001]-axis direction; eutectic alloy; grain isolation; high-coercive force; infiltrated nanocrystalline magnet; intensity variation; magnetic isolation; magnetic-field dependence; magnetization reversal process; non-polarized neutron beam; small-angle neutron scattering; Magnetic domain walls; Magnetic domains; Magnetization reversal; Perpendicular magnetic anisotropy; Saturation magnetization; Storage area networks; Coercive force; magnetic domains; magnetization reversal; neodymium compounds; neutrons;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2332759
