Electricity And Magnetism

Aufgabensammlung Elektrotechnik, Bd.2, Magnetisches Feld und by Martin Vömel, Dieter Zastrow

By Martin Vömel, Dieter Zastrow

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It is noteworthy to mention that a further step in the reactive deposition procedure is represented by the use of more reactive oxidizing agents like atomic oxygen or NO2 [1, 20, 21]. It has been reported that this procedure significantly improves the film quality mainly in terms of interface sharpness, surface flatness, and substrate wettability even at the lowest coverages. Relevant recent examples refer to the preparation of NiO [22] and FeO [23] films. 1 Introduction As mentioned before, the availability of more and more sophisticated and reliable characterization methods and apparatus was a key factor in pushing both fundamental and technological activities on magnetic films in general and oxide AF films in particular.

W. (1985) Band gaps and electronic structure of transition-metal compounds. Phys. Rev. Lett, 55, 418. W. (1959) New approach to the theory of superexchange interactions. Phys. Rev, 115, 2. Zaanen, J. A. (1987) The electronic structure and superexchange interactions in transition-metal compounds. Can. J. Phys, 65, 1262. H. (1988) Theory of superexchange in antiferromagnetic insulators. J. Phys. C: Solid State Phys, 21, L193. M. M. (1983) Conductivity and ‘negative U’ for ionic grain boundaries. J.

Appl. Phys. Lett, 77, 1020. 1 Introduction Because of the challenging fundamental electronic properties, of the potential applications in different areas ranging from catalysis to spin electronics and of their significant role in the chemical and physical processes taking place in the ecosystem, there is a steadily growing interest in the research on metal-oxides [1–4]. From the magnetic point of view, much of the past and current efforts have focused on binary metal-oxide (Mex Oy ) thin films containing 3d transition metals like Mn, Fe, Co, or Ni, because of their importance in magnetic devices technology.

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