Magnetic scattering of spin polarized carriers in (In, Mn)Sb dilute magnetic semiconductor

Magnetoresistance measurements on the magnetic semiconductor (In, Mn)Sb suggest that magnetic scattering in this material is dominated by isolated Mn2+ ions located outside the ferromagnetically ordered regions when the system is below T(c). A model is proposed, based on the p-d exchange between spin-polarized charge carriers and localized Mn2+ ions, which accounts for the observed behavior both below and above the ferromagnetic phase transition. The suggested picture is further verified by high-pressure experiments, in which the degree of magnetic interaction can be varied in a controlled way.     

Nanoscale zeeman localization of charge carriers in diluted magnetic semiconductor-permalloy hybrids

We investigate the possibility of charge carrier localization in magnetic semiconductors due to the presence of a highly inhomogeneous external magnetic field. As an example, we study in detail the properties of a magnetic semiconductor-permalloy disk hybrid system. We find that the giant Zeeman response of the magnetic semiconductor in conjunction with the highly nonuniform magnetic field created by the vortex state of a permalloy disk can lead to Zeeman localized states at the interface of the two materials. These trapped states are chiral, with chirality controlled by the orientation of the core magnetization of the permalloy disk. We calculate the energy spectrum and the eigenstates of these Zeeman localized states, and discuss their experimental signatures in spectroscopic probes.     

Über das Wachstum gewisser Klassen kanonischer Produkte

Ohne ZusammenfassungHerrn Prof. Dr. G. Frank danken wir für seine wertvollen Hinweise.     

Untersuchungen ganzer und meromorpher Funktionen unendlicher Ordnung

Ohne ZusammenfassungHerrn Prof. Dr.Hans Wittich zu seinem 70. Geburtstag am 4. Mai 1981 in Verehrung gewidmet     

Integral- und Differentialoperatoren bei einer Differentialgleichung mit mehreren komplexen Veränderlichen

Ohne Zusammenfassung