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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Cobalt-Based Ferrites Characterization Using Two Different Terahertz Time-Domain Spectrometers

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Boss, Alan Fernando Ney [1] ; Batista, Hudson de Araujo [2] ; Figueiredo de Melo Costa, Ana Cristina [2] ; da Cunha Migliano, Antonio Carlos [1, 3] ; Wilke, Ingrid [4]
Total Authors: 5
[1] Inst Tecnol Aeronaut Ciencias & Tecnol Espaciais, Sao Jose Dos Campos, SP - Brazil
[2] Univ Fed Campina Grande, Ctr Ciencias & Tecnol, Campina Grande, PB - Brazil
[3] Inst Estudos Avancados, Dept Ciencia & Tecnol Aeroespacial, Div Fis Aplicada, Sao Jose Dos Campos, SP - Brazil
[4] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY - USA
Total Affiliations: 4
Document type: Journal article
Source: Journal of Infrared Millimeter and Terahertz Waves; v. 39, n. 11, p. 1127-1139, NOV 2018.
Web of Science Citations: 0

We report an experimental study of the electrical properties of manganese cobalt (MnCo) and nickel cobalt (NiCo) ferrites in the terahertz (THz) frequency band. The study is motivated by the potential of MnCo, NiCo, and other magnetic ceramics for the fabrication of active and passive devices for THz wave communications. Using two different terahertz (THz) time-domain spectroscopy systems, we characterized the optical constants of cobalt ferrites doped with manganese and nickel in the technologically important 0.2-1 THz frequency band. The MnCo and NiCo ferrites investigated in our study exhibit a lower refractive index and absorption coefficient in the 0.2-1 THz frequency band than commercial strontium ferrite. We observed that using different valency ion oxide leads to a sudden change of the refractive index as a function of sample stoichiometries. Our experimental results provide evidence that microwave ferrite technology can be extended to the THz frequency band. (AU)

FAPESP's process: 12/01448-2 - Cobalt ferrite development to sensors enclosering application to RF and microwave
Grantee:Antonio Carlos da Cunha Migliano
Support type: Regular Research Grants