We report microscopic calculation of the static magnetic and spin‐wave properties of dilute antiferromagnetis (e.g. KMn1−x Zn xF3) and of dilute ferromagnetic garnets. The results are valid at low temperatures but are not restricted to low concentration of dilutents. Disciplines Materials Science and Engineering | Physics Comments Proceedings of Magnetism and Magnetic Materials conference, 1974...

Origination of electron magnetic chiral dichroism in cobalt-doped ZnO dilute magnetic semiconductors Z.H. Zhang,a,c,⇑ H.L. Tao, Ming He and Quan Li Liaoning Key Materials Laboratory for Railway, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China Department of Physics, Dalian Jiaotong University, Dalian 116028, China Department of Physics, The Chinese U...

3 Magnetic Dipole Moment, Gyromagnetic Ratio, Bohr Magneton, Landeg-Factor and Larmor Precession 8 3.1 Magnetic Dipole Moment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2 Gyromagnetic Ratio, Bohr Magneton and Lande-g-Factor . . . . . . . . . . . 8 3.3 Larmor Velocity, Precession and Magnetic Resonances . . . . . . . . . . . . . 11 3.3.1 Quantum and Classical Pictures . . . . ...

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...

The energy of long wave length spin waves in dilute Heisenberg ferromagnets is calculated. It is shown that spin waves can exist only within an infinite cluster of magnetic spins and that such spin waves are mechanically stable. Heuristic arguments based on dimensionality of the infinite cluster imply that there is no thermal instability of the type discussed by Mermin and Wagner. Thus, the cri...

We report the synthesis and properties of rod-shaped gold/iron oxide nanomotors that are powered by visible light in dilute hydrogen peroxide solutions. Electrochemical measurements confirmed that the light-driven nanomotors operate by a self-electrophoretic mechanism, modulated by the photovoltage and the photoconductivity of gold/iron oxide. Due to the magnetism of iron oxide, the nanomotors ...

Dilute magnetic semiconductors (DMS) are envisioned as sources of spin-polarized carriers for future semiconductor devices which simultaneously utilize spin and charge of the carriers. The hope of discovering a DMS with ferromagnetic order up to room temperature still motivates research on suitable DMS materials. Two candidate wide-band gap DMS are Gd:GaN and Co:ZnO. We have used hard X-ray abs...

In this work, we introduce a new perspective in explaining the origin of magnetism in dilute magnetic semiconductors, carbon-based materials and other related materials. According to our proposal, the magnetism in these materials is the result of the synergistic action of defect-induced electronic processes mostly of local character which can provide magnetic moments and develop a ferromagnetic...