Synthesis And Analyses Of ZnFeO Diluted Magnetic Semiconductor

As a branch of Spintronics, diluted magnetic semiconductor (DMS)is to combine magnetic irons into traditional semiconductors and to replace the lattice position of the semiconductor. The sp-d or RKKY interaction between magnetic irons and current carrier of the original non-magnetic semiconductor irons can cause the uniformed spin orientation, and thus the material will have ferromagnetic performance in macroscopic. DMS takes advantage of both charge and spin properties of electrons, and will play an important role in the integrated circuit and other material with memory. ZnO is a kind of widely used material with excellent performance in both optics and electronics, this made it extremely popular in the research o f DMS.ZnO with Fe as the doping material has been fabricated in two different ways of magnetron sputtering and Sol-Gel, in order to achieve a method for convenient synthesize of the DMS. Target space doping has been used in the method of magnetron sputtering to achieve the doping of Fe iron, and Zn_1-xFe_xO film has been synthesized in different conditions. The density of Fe iron was measured with Inductively Coupled Plasma (ICP). Lattice structure of the film has been tested by X-ray Diffraction and the result shows that ZnO film with fine crystal structure can be synthesized by this method. Magnetic properties of the film were also tested with Superconductivity Quantum Interference Device (SQUID).Sol-Gel is a kind of chemical method, comparing with magnetron sputtering it has the advantage of low-costing and easy to control the amount of doping. Both powder and film samples have been synthesized with this method, fluorescence spectrum and lattice structure were tested, magnetic loop and the M-T curve of the fabricated sample were measured with SQUID.The result shows that there are obvious differences in the nature of the samples fabricated with magnetron sputtering and Sol-Gel. No magnetic loop has been found in samples fabricated with magnetron sputtering method, but there is obvious magnetic loop in both powder and film samples fabricated with Sol-Gel in the temperature of 10K.