Title :
Interaction domains in isotropic, fine-grained Sm2Fe17N3 permanent magnets
Author :
Rave, W. ; Eckert, D. ; Chafer, R. ; Gebel, B. ; Muller, K.-H.
Author_Institution :
IFW Dresden, Germany
fDate :
9/1/1996 12:00:00 AM
Abstract :
The magnetization process in fine grained Sm2Fe17 N3 permanent magnets were studied with high resolution Kerr microscopy and measurements of the magnetization curves. Different susceptibilities after thermal and DC-demagnetization were observed for HDDR processed samples but not for long milled material. The differences for the HDDR material are interpreted considering cooperative magnetization phenomena (`interaction domains´) that produce changes in the degree of frustration between the magnetization directions of neighbouring grains
Keywords :
Kerr magneto-optical effect; demagnetisation; ferromagnetic materials; iron alloys; magnetic domains; magnetic particles; magnetic susceptibility; magnetisation; permanent magnets; samarium alloys; DC-demagnetization; HDDR processed samples; Sm2Fe17N3; fine-grained permanent magnets; high resolution Kerr microscopy; hydrogenation disproportionation desorption recombination; long milled material; magnetization; susceptibility; thermal demagnetization; Demagnetization; Iron; Magnetic domain walls; Magnetic materials; Magnetization processes; Milling; Permanent magnets; Powders; Samarium; Scanning electron microscopy;
Journal_Title :
Magnetics, IEEE Transactions on
