Excellent microwave and magnetic properties of La-Cu substituted Ba-hexaferrites prepared by ceramic process

We demonstrate exceptional microwave magnetic performance of crystallographycally textured barium hexaferrites prepared by conventional ceramic method. Vibrating sample magnetometer (VSM) and rectangular cavity perturbation measurements indicate that bulk Ba0.8La0.2Fe11.2Cu0.2O19 samples exhibit a s...

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Bibliographic Details
Published inarXiv.org
Main Authors Wu, Chuanjian, Yu, Zhong, Sun, Ke, Sokolov, Alexander S, Guo, Rongdi, Yang, Yan, Yu, Chengju, Jiang, Xiaona, Zhongwen Lan, Harris, Vincent G
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 18.01.2018
Subjects
Barium
Broadband
Copper
Crystallography
Ferromagnetic resonance
Ferromagnetism
Magnetic anisotropy
Magnetic fields
Magnetic permeability
Magnetic properties
Magnetism
Magnetization
Millimeter waves
Permeability
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Summary:We demonstrate exceptional microwave magnetic performance of crystallographycally textured barium hexaferrites prepared by conventional ceramic method. Vibrating sample magnetometer (VSM) and rectangular cavity perturbation measurements indicate that bulk Ba0.8La0.2Fe11.2Cu0.2O19 samples exhibit a strong magnetic anisotropy field Ha of 14.6kOe, the highest remanent magnetization of 3.96kGs, and the lowest ferromagnetic resonance (FMR) linewidth of 401Oe with zero applied bias field at Q-band. Broadband millimeter-wave transmittance measurements determined the complex permeability and permittivity. The remanent magnetization, anisotropy field Ha, and effective linewidth were also estimated based on Schlomann's theory of the complex permeability. These calculated values are in good agreement with the VSM and FMR measurements.
ISSN:2331-8422