Ferromagnetic and random spin ordering in dilute magnetic semiconductors

Dilute Magnetic Semiconductors

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Introduction to Dilute Magnetic Semiconductors

This paper begins with a brief introduction to the field of spintronics and dilute magnetic semiconductor (DMS), the second part discusses in detail on three typical DMS materials–(Ga,Mn)As, (Ga,Mn)N and Transition metal doped oxide. Next mechanism of DMS ferromagnetism along with its magneto transport properties are discussed. Following that, an important sample preparation technique in DMS– M...

Oxide-based dilute ferromagnetic semiconductors: ZnMnO and Co:TiO2

Mn 3d electronic configurations in „Ga1−xMnx...As ferromagnetic semiconductors and their influence on magnetic ordering

We applied x-ray absorption spectroscopy and x-ray magnetic circular dichroism XMCD at the Mn 2p-3d resonances to study the Mn 3d electronic configuration and the coupling of Mn 3d magnetic moments in various Ga1−xMnxAs films. The homogeneity of the Mn depth profile throughout the Ga1−xMnxAs film was tested by additional structure-sensitive x-ray resonant reflectivity measurements. In all inves...

Magnetic Impurity States and Ferromagnetic Interaction in Diluted Magnetic Semiconductors

The electronic structure of diluted magnetic semiconductors is studied, especially focusing on the hole character. The Haldane-Anderson model is extend to a magnetic impurity, and is analyzed in the Hartree-Fock approximation. Due to the strong hybridization of an impurity d-states with host p-states, it is shown that holes are created in the valence band, at the same time the localized magneti...