Abstract
Magnetic metal-insulator nanocomposites (NCs) consist of an ensemble of ultrafine ferromagnetic nanogranules chaotically distributed in a nonmagnetic dielectric matrix. Depending on chemical compositions of constituent materials, a volume fraction of metal close or far from the percolation threshold, technological parameters during fabrication these materials exhibit a wide diversity of magnetic, transport, high frequency, optical and magneto-optical properties important for fundamental research and promising for various applications. In this chapter structural, magnetic, magneto-transport, and memristive properties of NCs thin films (Co40Fe40B20)х(Al2O3–z)100–х and (Co40Fe40B20)х(LiNbO3–z)100–х fabricated by ion-beam sputtering are discussed focusing on novel features such as presence of a large amount of dispersed metal ions in the matrix, logarithmic temperature dependence of electrical resistivity, tunneling anomalous Hall effect, resistive switching.
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