Microstructures, magnetic and electric properties of diluted magnetic semiconductors InTe<inf>1-x</inf> Fe<inf>x</inf> (Co<inf>x</inf>)

Abstract

InTe compound doped by 10% of Fe or Co respectively was synthesized. X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), energy dispersive X-ray (EDX), vibrating sample magnetometer (VSM) and Kiethley electrometer were used for characterizing the prepared samples. XRD show the presence of InTe0.9Fe0.1 or InTe0.9Co0.1 together with minor In4Te 3 phase. InTe0.9Fe0.1 is ferromagnetic with high Curie and high blocking temperature, while InTe0.9Co 0.1 is antiferromagnetic with two high Neels temperatures. σRT of InTe0.9Fe0.1 and InTe0.9Co0.1 are greater than those of InTe. The higher conductivity is due to the higher carrier's density obtained from the interaction of the sp-d orbitals, of the electric and magnetic system. The presence of In4Te3 minor phase and different kinds of defects are taking major roles in the formation of high Tc ferromagnetism and antiferromagnetism. © 2013 Elsevier Ltd.