Magnetization Process in Dilute Magnetic Oxides

Temperature-dependent orbital-moment anisotropy in dilute magnetic oxides

Donor impurity band exchange in dilute ferromagnetic oxides.

Dilute ferromagnetic oxides having Curie temperatures far in excess of 300 K and exceptionally large ordered moments per transition-metal cation challenge our understanding of magnetism in solids. These materials are high-k dielectrics with degenerate or thermally activated n-type semiconductivity. Conventional super-exchange or double-exchange interactions cannot produce long-range magnetic or...

Dilute Magnetic Semiconductors

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Magnetic pyrochlore oxides

Within the past 20 years or so, there has occurred an explosion of interest in the magnetic behavior of pyrochlore oxides of the type A 2 B 4+ 2 O7 where A is a rare-earth ion and B is usually a transition metal. Both the A and B sites form a network of corner-sharing tetrahedra which is the quintessential framework for a geometrically frustrated magnet. In these systems the natural tendency to...

Magnetic Moment and Magnetization

Magnetismhas engaged explorers and scientists for over two millennia. The ancient Greeks and Turks noted the attraction between magnetite (lodestone) and iron (Cullity and Graham, 1978). Explorers used lodestone’s magnetization to construct compass needles used to point to the direction of the earth’s magnetic North Pole. This singularly important device aided in navigation and the exploration ...