Author(s)

Imaddin A. Al-Omari, M. R. Anantharaman

Department of Physics, Cochin University of Science and Technology, Cochin, India.
Department of Physics, Sultan Qaboos University, Muscat, Sultanate of Oman.

The results of the investigation of the magnetic and structural properties of the alloy system Fe_0.75–xSi_0.25Sb_x, where x = 0, 0.05, 0.1, 0.15, 0.2, and 0.25 synthesized by mechanical alloying followed by heat treatment are described. The x-ray diffraction reveals that all samples crystallize in the DO₃-type cubic phase structure. Substituting Fe by Sb led to a decrease in the lattice constant and the unit cell volume. The magnetic properties are investigated by vibrating sample magnetometer and show that all the samples are ferromagnetically ordered at room temperature. The Curie temperature is found to decrease linearly from (850 ± 5) K for the parent alloy to (620 ± 5) K for the alloyith x = 0.25. The saturation magnetizations at room temperature and at 100 K are found to decrease with increasing the antimony concentration. The above results indicate that Sb dissolves in the cubic structure of this alloy system.

Lattice Constant; Curie Temperature; Saturation Magnetization

I. Al-Omari and M. Anantharaman, "The Effect of Antimony Substitution on the Magnetic and Structural Properties of Fe_0.75–xSi_0.25Sb_x Alloys," World Journal of Condensed Matter Physics, Vol. 2 No. 2, 2012, pp. 61-65. doi: 10.4236/wjcmp.2012.22011.