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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gan’shina, Elena A., Granovsky, Alexandr B., Garshin, Vladimir V., Pripechenkov, Ilya M., Sitnikov, Alexandr V., Volochaev M. N., Ryl’kov, Vladimir V., Nikolaev, Sergey N.
Заглавие : Magneto-optical spectroscopy of nanocomposites (CoFeZr)x(Al2O3)100-x
Место публикации : SPIN. - 2023. - Vol. 13, Is. 1. - Ст.2340006. - ISSN 20103247 (ISSN), DOI 10.1142/S2010324723400064. - ISSN 20103255 (eISSN)
Примечания : Cited References: 17. - This work was supported in part by the Russian Foundation for Basic Research under Grant 22-29-00392. Magnetic and MO studies were performed using equipment purchased at the expense of the MSU The authors thank the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” for assistance
Аннотация: We present results of magneto-optical investigations of (CoFeZr)x(Al2O3)100-x film nanocomposites in transverse Kerr effect (TKE) geometry in the spectral range 0.5-4.0eV and magnetic field up to 3.0kOe. Nanocomposites were deposited onto a glass-ceramic substrate by ion-beam sputtering. The TKE response at room temperature strongly depends on the wavelength of light, applied magnetic field H and the volume metallic fraction. From the analysis of the field dependences of TKE at different wavelengths, it follows that in the as-deposited samples, the interaction between nanoparticles at x30at.% is small and the nanocomposite is an ensemble of superparamagnetic particles; as x increases to 32at.%, a superspinglass-type state arises, then, in the vicinity of 34at.%, along with individual superparamagnetic particles, superferromagnetic regions appear. Long-range ferromagnetic order arises at concentrations x less than the percolation threshold for conductivity xper
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