Magnetic Study of Nanostructural Composite Material Based on Cobalt Compounds and Porous Silicon

摘要

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 Co_2B and/or Co_3B. The possibility to apply the concept of blocking temperature to specify the magnetic behavior of the compound on temperature confirmed the singledomain state of these particles.