Abstract
This paper focuses on the cavity perturbation technique to measure the dielectric properties of nanoparticles: (i) cobalt ferrite (ii) barium titanate and (iii) core-shell cobalt ferrite-barium titanate. The shift in TE103 and TE105 resonant mode is compared for the above three nanomaterials which in turn is correlated to its dielectric properties. Barium titanate has the highest shift in resonance peak and it is directly proportional to its relative permittivity followed by cobalt ferrite-barium titanate and cobalt ferrite respectively. However, the half power bandwidth, is highest for the cobalt ferrite nanoparticles and least for barium titanate. Approximately 1.145 MHz shift and 3.391 MHz shift is observed for the insertion of the lossy core-shell cobalt ferrite in TE103 and TE105 modes. The quality factor for barium titante was measured to be approximately twice to that of cobalt ferrite for this particular experiment.
Acknowledgments
The authors acknowledge the contribution of Dr. Chonglin Chen, The University of Texas at San Antonio and Dr. Yongcan Cao, The University of Texas San Antonio for their valuable insight on the topic.
Disclosure Statement
No potential conflict of interest was reported by the author(s).