Abstract
The effect of Ti substitution on the microwave and magnetostatic properties of nanostructured hexagonal BaFe12−xTixO19 ferrite composites is studied. The microwave permeability is measured in the frequency range of 0.1–22 GHz by a coaxial technique. An analysis of the magnetostatic data is made by the law of approach to saturation. The ferrimagnetic resonance frequencies calculated from the magnetostatic data are consistent with those obtained from the microwave measurements. The natural ferrimagnetic resonance frequencies are located in the frequency range of 15 to 22 GHz, depending on the substitution level x. An increase in the amount of substitution elements results in a low-frequency shift of the ferrimagnetic resonance frequency for samples with x < 1. With x rising from 1 to 2.5, the resonance frequency increases. The results of the study demonstrate that the tailored optimization of the nano-structure of a functional material is a robust tool to fine-tune its microwave magnetic properties. The ferrites under study are promising materials to be applied as functional coatings intended to control electromagnetic interference in microwave devices.
Highlights
Magnetic materials with a high microwave permeability are needed in many fields of modern technology, such as high-frequency electronics, electromagnetic compatibility applications, and 5G communications
This study focuses on the effect of Ti ion substitution on the magnetic and microwave properties of hexaferrite composites of BaFe12−x Tix O19 with x = 0.25 to 2.5
The results demonstrate that the tailored optimization of the nano-structure of a functional material is a robust tool to finetune its microwave magnetic properties
Summary
Magnetic materials with a high microwave permeability are needed in many fields of modern technology, such as high-frequency electronics, electromagnetic compatibility applications, and 5G communications. The applications of magnetic materials are divided into two categories [1] The first of these is the energy conversion of electromagnetic fields and high-frequency signal matching—such materials are typically required to have a low loss, especially magnetic, with the real permeability being high. The second category implies materials having a high magnetic loss for applications where the attenuation and absorption of a high-frequency magnetic field is required. For both the cases, a typical requirement is low values of permittivity and conductivity.
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