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Magnetic Study of Nanostructural Composite Material Based on Cobalt Compounds and Porous Silicon |
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| Authors: | V A Ryzhov I V Pleshakov A A Nechitailov N V Glebova E N Pyatyshev A V Malkova I A Kiselev V V Matveev |
| Institution: | 1. Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina, 188300, Russia 2. Ioffe Physical-Technical Institute of the Russian Academy of Sciences, Saint Petersburg, 194021, Russia 3. Saint Petersburg State Polytechnical University, Saint Petersburg, 195251, Russia 4. Faculty of Physics, St. Petersburg State University, Saint Petersburg, 198504, Russia |
| Abstract: | In present work, an investigation of a magnetically ordered material, which is a composite structure obtained by embedding of cobalt-containing substance into pores of silicon matrix, was performed. The samples were characterized by steady-state magnetometry and electron microscopy. The methods of longitudinal nonlinear response to a weak ac magnetic field and registration of electron magnetic resonance were used for detail study of their properties. It was established that the material forms a structure of ferromagnetic particles at the inner surface of pores. It was agued that they are mainly nonmetallic magnetic particles like Co2B and/or Co3B. The possibility to apply the concept of blocking temperature to specify the magnetic behavior of the compound on temperature confirmed the single-domain state of these particles. |
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