Institution: | aPhysics Research Center, Science and Research Campus, Islamic Azad University, Tehran, Iran bPhysics Department, Tehran-North Branch, Islamic Azad University, Tehran, Iran cPhysics Department, Tarbiat Modarres University, P.O. Box 14155-4838, Tehran, Iran dMagnet Research Laboratory (MRL), Department of Physics, Sharif University of Technology, P.O. Box 11365-9161, Tehran, Iran |
Abstract: | The single-domain particles, especially FeCo fine particles have many applications in magnetic information technology. We have prepared Fe1?xCox fine particles for different x by borohydride method and measured the magnetic and structural properties of the samples. We have then determined the variations of coercivity and anisotropy energy versus x in Fe1?xCox fine particles. The obtained results have been analyzed on the basis of various magnetic anisotropies. Magnetic anisotropies affect the coercivity of the medium for each x as follows: shape and crystal anisotropies for x=0, surface and crystal anisotropies for x=1, shape, induced and crystal anisotropies for x=0.3 and 0.5, and shape and induced anisotropies for x=0.45. |