Effect of Sm content on energy product of rapidly quenched and oriented SmCo5 ribbons

Authors

Wenyong Zhang, University of Nebraska-LincolnFollow
Xingzhong Li, University of Nebraska-LincolnFollow
Shah R. Valloppilly, University of Nebraska-LincolnFollow

Date of this Version

11-2015

Citation

Published in Applied Physics A (2015) 118:1093–1097.
DOI 10.1007/s00339-014-8881-6

Comments

Copyright © 2014 Springer-Verlag Berlin Heidelberg. Used by permission.

Abstract

The Sm-content dependence of phase composition, anisotropy, and other magnetic properties of Sm_1+δCo₅ (δ ≤ 0.12) ribbons melt spun at 10 m/s has been studied. The samples consist of hexagonal SmCo₅ grains whose c axes are preferentially aligned along the long direction of the ribbon. The lattice parameter a and the cell volume (V) increase with increasing Sm content δ, whereas c decreases. Sm addition appears to improve the degree of the preferred orientation of the c-axis and to increase the mean grain size, which weakens the effective intergranular exchange coupling. Therefore, the remanence ratio, coercivity, and squareness of the hysteresis loops are significantly enhanced. The remanence ratio of 0.91 and the maximum energy product of 21.2 MGOe, which is the highest value reported so far for Sm–Co ribbons, are achieved for δ = 0.06. High performance in combination with simple processing may facilitate high-temperature applications for anisotropic Sm_1+δCo₅ ribbons.