Magnetic and structural studies in Sm-Fe-Ti magnets

Authors

Y. Wang, Department of Physics, Kansas State University, Manhattan, Kansas
George C. Hadjipanayis, Kansas State UniversityFollow
A. Kim, Crucible Research, Pittsburgh, Pennsylvania
N.C. Liu, Crucible Research, Pittsburgh, Pennsylvania
David J. Sellmyer, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

5-1-1990

Comments

Published by American Institute of Physics. J. Applied Physics 67, 4954 (1990). ©1990 American Institute of Physics. Permission to use. http://jap.aip.org/jap/.

Abstract

The effects of vanadium substitution on the magnetic properties of Sm-Fe-Ti-V melt-spun ribbons and the magnetic properties and microstructure of sintered Sm-Fe-Ti based magnets are reported. The highest coercivity, H_c =10.65 kOe, was obtained in a heat-treated melt-spun Sm₈ Fe_75.5 Ga_0.5 Ti₈ V₈ alloy. This is the highest value of the coercivities reported in alloys with the ThMn₁₂ -type structure. Bulk magnets were prepared by the usual powder metallurgy technique. However, their highest coercivity (~2 kOe) was much less than that of the corresponding ribbons. The low coercivity of sintered magnets has been attributed to their nonuniform microstructure. Journal of Applied Physics is copyrighted by The American Institute of Physics.