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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Here we use the term “magnetic”, since one can expect the presence of both paramagnetic and ferromagnetic fractions in the sample and the observation of electron paramagnetic and ferromagnetic resonances, respectively.
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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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Ryzhov, V.A., Pleshakov, I.V., Nechitailov, A.A. et al. Magnetic Study of Nanostructural Composite Material Based on Cobalt Compounds and Porous Silicon. Appl Magn Reson 45, 339–352 (2014). https://doi.org/10.1007/s00723-014-0527-5
- Porous Silicon
- Magnetic Anisotropy
- Zero Field Cool
- Ferromagnetic Particle
- Electron Magnetic Resonance