Surface physics, thin films

Magnetism of hybrid SiC/Si structures synthesized by the method of vacancy-coordinated substitution of atoms

V. V. Romanov^a, N. I. Rul'^ab, I. D. Venevtsev^a, A. V. Korolev^c, S. A. Kukushkin^d, N. T. Bagraev<sup>b

a</sup> Peter the Great St. Petersburg Polytechnic University
^b Ioffe Institute, St. Petersburg
^c Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg
^d Saint Petersburg State University

Abstract: The magnetic properties of SiC/Si hybrid structures grown on $n$- and $p$-type silicon surfaces have been studied by vacancy coordinated atomic substitution (VMCSA). The magnetization of the samples was measured at SQUID installations at temperatures of 5, 100, and 350 K at external magnetic field strengths from -25 to 25 kOe and by the Faraday method at the Faraday Balance installation at room temperature in fields from -11 to 11 kOe. The analysis of the field dependences of magnetization obtained in the experiment showed a high efficiency of using these techniques together to interpret the results obtained. It was possible to detect and explain the occurrence of the paramagnetic component of magnetization by the formation of the superparamagnetic state of vacancies in silicon carbide. Periodic oscillations in the reverse field were detected, identified as the de Haase–van Alphen effect, as well as Aharonov–Bohm oscillations caused by the capture of magnetic flux quanta by defects in the hybrid structure.

Keywords: magnetization, superparamagnetism, de Haase–van Alphena effect, Aharonov–Bohm oscillations, silicon carbide on silicon, silicon vacancies, nanostructures.

Received: 08.06.2025
Revised: 17.07.2025
Accepted: 17.07.2025

DOI: 10.61011/FTT.2025.08.61333.161a-25

Bibliographic databases:

•