The effect of grain size on magnetic properties in Sm₂Fe₁₇N_x

Authors

Jeffrey E. Shield, University of Nebraska - LincolnFollow
D.J. Branagan, Idaho National Engineering and Environmental Laboratory, Idaho Falls, Idaho
C.P. Li, Ames Laboratory, Ames, Iowa
R.W. McCallum, Ames Laboratory, Ames, Iowa

Date of this Version

5-15-1998

Comments

Published in JOURNAL OF APPLIED PHYSICS VOLUME 83, NUMBER 10. © 1998 American Institute of Physics. Used by permission.

Abstract

The microstructures of melt spun Sm11Fe89 and (Sm₁₁Fe₈₉)₉₄Ti₃C₃ have been investigated under different solidification conditions. The magnetic properties of the nitrided materials have been related to the observed microstructures. Melt spinning of the Sm₁₁Fe₈₉ alloys resulted in grain sizes at or above the single domain limit. The addition of Ti and C resulted in an order of magnitude refinement in the microstructural scale. The magnetic properties of the samples with grain sizes below the single domain limit decreased with decreasing grain size due to increased intergranular exchange coupling.