Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 20, Pages 29504-29508Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.07.119
Keywords
Ni-Zn ferrites; Complex magnetic permeability; Microstructure; Magnetizing mechanism; Spin rotation; Domain-wall motion
Categories
Funding
- Ministerio de Economia y Competitividad (Spain) [MAT2016-76320-R]
- Universitat Jaume I (Spain) [UJIB2017-48, UJIB2020-13, POSDOC/2020/04]
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This study further demonstrates the strong relationship between complex permeability of Cu-doped Ni-Zn polycrystalline ferrites and microstructure by extending the previous microstructural model to a wider angular frequency range. Additionally, the study highlights the influence of domain-wall motion and spin rotation contributions to magnetic permeability at different angular frequencies in the mathematical model.
The complex permeability of the Cu-doped Ni-Zn polycrystalline ferrites is strongly dependent on microstructure, particularly on relative density (phi) and average grain size (G), as it has been shown in a previous study developed at a constant angular frequency (107 Hz). In this study, the previous microstructural model proposed has been extended to an angular frequency range (from 106 to 109 Hz) demonstrating its validity and reliability. In addition, domain-wall motion and spin rotation contributions to magnetic permeability have been individually considered in the mathematical model, highlighting the relative influence of each magnetizing mechanism at different angular frequencies.
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