Titlebook: Local-Moment Ferromagnets; Unique Properties fo Markus Donath,Wolfgang Nolting Book 2005 Springer-Verlag Berlin Heidelberg 2005 Condensed m

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Dilute Ferromagnetic Oxides,t is suggested that the strong ferromagnetic exchange is mediated by electrons from donor states associated with lattice defects. These electrons form magnetic polarons in a spin-split impurity band in an appropriate concentration range. Minority-spin 3d states of Fe, Co or Ni dopants are pinned at

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Half-Metals: Challenges in Spintronics and Routes Toward Solutions,eractions similar as in III-V semiconductors are responsible. The effect is intimately related with the crystal structure, while the electron-electron interactions are weak. A second category is found in the limit of strong magnetism. Chromium-dioxide is an archetype here. In the third category, str

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Magnetization, Spin Polarization, and Electronic Structure of NiMnSb Surfaces,tructure predict exclusively majority bands at the Fermi level, thus indicating 100% spin polarization there. As one thinks about applications and the design of functional materials, the in.uence of reduced dimensions, e.g., in ultrathin films or at interfaces, must be considered. The magnetization,

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Spin Injection Experiments from Half-Metallic Ferromagnets into Semiconductors: The Case of NiMnSb hey do not suffer from the conduction mismatch problem encountered by ferromagnetic metals with incomplete spin polarization. However, I show that truly half-metallic contacts are extremely challenging to fabricate, and will in many cases suffer from other problems such as the presence of a Schottky

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J. Kudrnovsky,L. Bergqvist,O. Eriksson,V. Drchal,I. Turek,G. Bouzerarorphismen natürliche Transformationen hei?en. Zu einer Kategorie kann man die Gegenkategorie bilden, bei der die Richtung aller Pfeile herumgedreht ist. Ein Funktor von einer solchen Gegenkategorie in die Kategorie der Mengen mit den Inklusionen als Morphismen hei?t Pr?garbe. Wenn man also einem Obj

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Perla Kacman,Izabela Kuryliszyn-Kudelskaorphismen natürliche Transformationen hei?en. Zu einer Kategorie kann man die Gegenkategorie bilden, bei der die Richtung aller Pfeile herumgedreht ist. Ein Funktor von einer solchen Gegenkategorie in die Kategorie der Mengen mit den Inklusionen als Morphismen hei?t Pr?garbe. Wenn man also einem Obj