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Shape Anisotropy of Magnetic Nanoparticles in (Co86Nb12Ta2) x (SiO2)1−x Composite Films Revealed by Grazing-Incidence Small-Angle X-Ray Scattering

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Abstract

Structure of amorphous nangranular composite (Co86Nb12Ta2) x (SiO2)1−x films was studied by means of grazing-incidence small-angle X-ray scattering as a function of atomic concentration x of the metal fraction in vicinity of the percolation threshold. It has been established that the average size of magnetic nanoparticles increases with x and this increment exhibit the anisotropic character. It was found that in a whole concentration range the particles are elongated along the growth direction perpendicular to the film plane. For the lowest concentration x = 0.193, clusters with isotropic shape and average radius of 1 nm were observed, while for higher concentrations up to x = 0.665, the average cluster length along the film normal is 1.5–7 nm and the cross-section is 1–2 nm.

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Acknowledgements

Authors thank the European Synchrotron Radiation Facility for the provided experimental opportunities. We would like to acknowledge A. Vorobiev and O. Konovalov for the technical assistance and O.V. Stognei for provided samples.

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Authors and Affiliations

  1. B. P. Konstantinov Petersburg Nuclear Physics Institute, National Research Center “Kurchatov Institute”, 188300, Gatchina, Russia

    V. Ukleev

  2. RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan

    V. Ukleev

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  1. V. Ukleev
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Ukleev, V. Shape Anisotropy of Magnetic Nanoparticles in (Co86Nb12Ta2) x (SiO2)1−x Composite Films Revealed by Grazing-Incidence Small-Angle X-Ray Scattering. J Supercond Nov Magn 31, 2099–2102 (2018). https://doi.org/10.1007/s10948-017-4459-9

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  • DOI: https://doi.org/10.1007/s10948-017-4459-9

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