**5. Conclusions**


**Author Contributions:** Conceptualization, methodology, and writing, I.B.; TEM investigation and writing, D.R.; SEM investigation, I.S.; TEM investigation, A.P.; Measurement of properties, T.A. and E.B. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the Ministry of Education and Science of the Russian Federation (a State Task on theme «Struktura», number AAAA-A18-118020190116-6).

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Data sharing not applicable.

**Acknowledgments:** The electron microscopic studies were performed at the Center of Collaborative Access Test Center of Nanotechnologies and Advanced Materials, Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia).

**Conflicts of Interest:** The authors declare no conflict of interest.
