Localized to Itinerant Electronic Transition in Perovskite Oxides WHO International Programme on Chemical Safety Die Systemtheorie nach Niklas Luhmann

Die Systemtheorie nach Niklas Luhmann ist eine sehr kontrovers diskutierte soziologische Theorie

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Localized to Itinerant Electronic Transition in Perovskite Oxides WHO International Programme on Chemical Safety Die Systemtheorie nach Niklas LuhmannInterest in the transition metal oxides with perovskite related structures goes back to the 1950s when the sodium tungsten bronzes NaxWO3 were shown to be metallic [1 ], the system Lal_xSr~MnO3 was found to contain a ferromagnetic conductive phase [2], and La0. sSr0. sCoO3 was reported to be a ferromagnetic metal, but with a peculiar magnetization of 1. 5 #a Co atom [3]. Stoichiometric oxide perovskites have the generic formula AMO3 in which the A