Syntheses And Properties Of Magnetism Elements Doped Indium Tin Oxide Nanosturctures

Dilute magnetic oxides have received great attention for their potential applications in combining semiconducting and ferromagnetic properties in a single material.Among oxide system hosts,ITO-based dilute magnetic oxides have high optical transparency,excellent electrical conductivity and high solubility of transition metal doped ions,which make it a promising candidate as a host matrix.Ferromagnetism is reported to have concerns about originating in the clusters of magnetic dopants without doping them into host oxide in the case of using physical manufacturing processes such as sputtering.In this study,we tried to produce magnetism element doped ITO nanoparticles via chemical thermolysis as facile synthetic method,which can be performed without expensive vacuum system.Furthermore,the corresponding magnetism element doped ITO nanoparticles thin films are fabricated via a sol-gol method,and explored their physical properties.The main research results are as follows:1.Some kinds of Dy-ITO nanoparticles with the various Dy and Sn concentrations were fabricated successfully via chemical thermolysis.Dy-ITO nanoparticles had good crystallinity without a Dy2O3 phase and the clusters of Dy.We found that the magnetization appeared owing to Dy doping.Especially,the magnetization significantly decreases without Sn doping.This enhancement of the magnetization reminds us carrier-induced ferromagnetism predicted by RKKY theory,and this suggests that the conduction electrons of Dy-ITO nanoparticles can strongly couple with f-electrons of Dy ions,which illustrates that there are strong exchange coupling between the spin of carriers and that of magnetism ions in quantum dot construction.Magnetoresistance(MR)attributing to weak anti-localization effect are observed for the sample grown by Sol-Gel method.Weak anti-localization effect is produced by Dy atoms.Dy3+ make ITO system have a strong coupling between spin and orbit.2.Fe-ITO nanoparticles film and Fe-ITO nanoparticles films had good crystallinity without an iron oxide phase via chemical thermolysis.The conductivity in the Fe-ITO is Efros-Shklovskii type variable range hopping conductivity.The MR curve of Fe-ITO nanoparticles thin film appearing positive MR variance ratio show the two dimensional electronic gas in system produce weak anti-localization due to spin scattering under circumstance of low temperature and weak magnetism field.Iron impurities lead a strong s-d coupling into ITO system.