A Phenomenological Approach for Understanding the High Magnetic Coercivity State of a Fe-O Nanocrystalline Press Compact
Kargin J. Lileev A.S. Konyukhov Y.V. Zhukov D.G. Cornejo H.S. Seo J.W. Holmes S.N. Aguiar J.A. Barnes C.H.W. De Los Santos Valladares L.
2025Institute of Electrical and Electronics Engineers Inc.
IEEE Transactions on Magnetics
2025#61Issue 9
Experimentally obtained magnetic signals for a Fe-O nanocrystalline press compact were fitted using a phenomenological approach. This method considers the individual properties of microvolumes and their statistics. It also helps avoiding complex calculations while focusing on local fundamental magnetic characteristics without considering internal processes. Currently, the precise estimation of internal processes in local areas is nearly impossible. They depend on fluctuations in the anisotropy field, texture degree, and phase ratio. A cubic compact (103 mm3 volume) was fabricated by pressing magnetite particles mixed with 20% iron by weight in a high-energy milling machine. After characterizing the compacts by X-ray diffraction (XRD), their magnetic signals were measured to obtain the saturation magnetization (Ms = 0.97 T), residual magnetization (Mr = 0.456 T), and coercivity (Hc = 0.685 kOe). The results suggest that the particle anisotropy fields relate to the effective anisotropy constants from the interaction between iron and magnetite particles. It is also found that single domains formed by iron particles contribute to high coercive states. This confirms that increasing the degree of texture results in an increment of the relative remanence and coercivity.
Iron oxide , magnetic properties of materials , nanocrystalline powder , press compacts
Text of the article Перейти на текст статьи
Department of Technical Physics, Faculty of Physics and Technical Sciences, NPJSC, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Department of Physics and Materials Science, National University of Science and Technology, MISIS, Moscow, 119049, Russian Federation
Laboratorio de Cerámicos y Nanomateriales, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Lima, 14-0149, Peru
College of Science and Technology Convergence, Yonsei University, Wonju, 26493, South Korea
Department of Electronic and Electrical Engineering, University College London, London, WC1E 7JE, United Kingdom
Programa de Pós-Graduação em Ciências de Materiais, Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, Recife, 50670-901, Brazil
Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0US, United Kingdom
Department of Technical Physics
Department of Physics and Materials Science
Laboratorio de Cerámicos y Nanomateriales
College of Science and Technology Convergence
Department of Electronic and Electrical Engineering
Programa de Pós-Graduação em Ciências de Materiais
Cavendish Laboratory
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026