Structure and magnetic properties of SmCo_7-xTi_x with TbCu₇-type structure

Authors

Jian Zhou, University of Nebraska - Lincoln
I.A. Al-Omari, University of Nebraska - Lincoln
J. Ping Liu, University of Nebraska-LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Date of this Version

5-1-2000

Comments

Published by American Institute of Physics. J. Applied Physics 87, 5299 (2000). ©2000 American Institute of Physics. Permission to use. http://jap.aip.org/jap/.

Abstract

The SmCo_7-xTi_x, x = 0–0.56 bulk samples are prepared by arc melting. X-ray diffraction indicates that samples with 0.2<x7-type structure phase and other minor phases appear for other values of x, which indicates that Ti helps stabilize the 1-7 phase. The lattice parameters ratio (c/a) increases with increasing Ti concentration. Room temperature saturation magnetization and Curie temperature decrease with increasing x. X-ray diffraction and magnetization measurements on aligned samples show that all samples studied have uniaxial anisotropy. The anisotropy field is found to increase with increasing x reaching a maximum of 175 kOe at x = 0.28 and then decreases for higher values of x. This anisotropy field is 20% higher than that of the same compound with Th₂Zn_17^-type structure.