Magnetic Study of Nanostructural Composite Material Based on Cobalt Compounds and Porous Silicon
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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.
KeywordsPorous Silicon Magnetic Anisotropy Zero Field Cool Ferromagnetic Particle Electron Magnetic Resonance
We are grateful to P.L. Molkanov (St.-Petersburg Nuclear Physics Institute) for help in M 2 measurements. This work was partly supported by the grant of Presidium of Russian Academy of Sciences P-03, and by the grant of Scholarship of President of Russian Federation.
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