The structural, electronic and MAGNETIC properties of Zn1-xMnxO dilute MAGNETIC SEMICONDUCTOR (DMS) were studied by the full potential-linear augmented plane wave (FP-LAPW), and for the exchange correlation potential, Generalized Gradient approximation (GGA) was used. The study was done in the framework of the density functional theory (DFT) by implementing the Wien2k code. The density of states showed spin polarization in Fermi level by substitution of Mn atom in the ZnO compound. The values of spin polarization depend on the crystallography structure of Zinc Oxide. Also, the MAGNETIC moment and the exchange splitting energy demonstrated different values for each structure.

We report the effect of external electric field (EEF) on the MAGNETIC properties of MnxGe1-x, DILUTED MAGNETIC SEMICONDUCTOR. We present a Kondo Lattice Model type Hamiltonian with exchange coupling between localized spins, itinerant holes and the EEF. The magnetization, the dispersion and critical temperature (Tc) are calculated for different values of EEF parameters (a) using double time temperature-dependent Green function formalism.The enhancement of the (Tc) with the EEF is shown to be very distinct and is in agreement with recent experimental observation and much required for spintronics applications and devices.

This paper shows the scattering mechanism at DILUTED MAGNETIC SEMICONDUCTORs. The doped MAGNETIC atom produces a scattering potential due to be coupled of itinerant carrier spin of host material with MAGNETIC momentum of the doped MAGNETIC atom. Formulas of scattering event were rewritten by the plane wave expansion and then the electron mobility of DMS was calculated. Calculations show Kondo effect on DILUTED MAGNETIC SEMICONDUCTORs at nonMAGNETIC phase. Here has been supposed that the doping concentration is low and so the coupling coefficient between MAGNETIC atoms is weak enough that DMS does not change its MAGNETIC phase. In other words, material is on paraMAGNETIC phase. For proofing our model, we have grown Zn0.99Mn0.01O with Sol-Gel route. Pure ZnO has also grown with this method for a comparison. Experimental results proved our theoretical model. Therefore as a result, at DILUTED MAGNETIC SEMICONDUCTORs similar to DILUTED MAGNETIC metals in nonMAGNETIC phase can observe kondod's effect.

Nano-powders of DILUTED MAGNETIC SEMICONDUCTOR Zn1-xFexO (0. 0≤ x ≤ 0. 1) were prepared via the sol-gel auto-combustion method. Crystal structure and phase identification carried out by X-Ray Diffraction (XRD) analysis. Mean crystallite size of the powders was estimated by Scherrer's formula. As M-H loops of the Fe substituted ZnO showed ferroMAGNETIC behavior. The results of X-Ray Photoelectron Spectroscopy (XPS) showed that there is a mixture of Fe3+ and Fe2+ ions in all Fe substituted samples. AntiferroMAGNETIC interaction between neighboring Fe3+-Fe2+ ions suppressed the ferroMAGNETIC behavior of the samples at higher doping concentrations of Fe.