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ISSN Печать: 0040-2508
ISSN Онлайн: 1943-6009
Indexed in
Abnormal Magnetic Properties of Granular Co-SiO2/GaAs Nanostructures at the Percolation Threshold Region
Краткое описание
Magnetic properties of granular Cox(Si02)100-x/GaAs nanostructures with the Co contents x = 20−85 at.% were studied. Static magnetic properties were examined by high-sensitive vibrating sample magnetometer (VSM) in the magnetic field up to 5 kOe at room temperature. Dynamic magnetic properties were investigated by the electron spin resonance (ESR) method in the frequency range of 25-28 GHz at room temperature. The anomalous local fall in the dependence of the magnetization on the Co concentration of granular nanostructures has been detected in the vicinity of the percolation threshold. According to the proposed theoretical model, the observed peculiarity of the magnetization dependence can be explained by the influence of the semiconductor substrate on the spin polarization of Co particles in the granular film.
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Lutsev L. V., Shelukhin L. A., Stognij A. I., Novitskii N. N., Relaxation processes of the light-induced giant injection magnetoresistance in semiconductor/granular-film heterostructures with cobalt nanoparticles, Physical Review B, 99, 13, 2019. Crossref