Characterization of microwave and terahertz dielectric properties of single crystal La2Ti2O7 along one single direction
AuthorsZhang, Man; orcid: 0000-0002-1094-7279
Tang, Zhiyong; orcid: 0000-0002-1921-6034
Smith, Graham; orcid: 0000-0003-3273-7085
Saunders, Theo; orcid: 0000-0003-4250-3071
Yan, Haixue; orcid: 0000-0002-4563-1100
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AbstractNew generation wireless communication systems require characterisations of dielectric permittivity and loss tangent at microwave and terahertz bands. La2Ti2O7 is a candidate material for microwave application. However, all the reported microwave dielectric data are average value from different directions of a single crystal, which could not reflect its anisotropic nature due to the layered crystal structure. Its dielectric properties at the microwave and terahertz bands in a single crystallographic direction have rarely been reported. In this work, a single crystal ferroelectric La2Ti2O7 was prepared by floating zone method and its dielectric properties were characterized from 1 kHz to 1 THz along one single direction. The decrease in dielectric permittivity with increasing frequency is related to dielectric relaxation from radio frequency to microwave then to terahertz band. The capability of characterizing anisotropic dielectric properties of a single crystal in this work opens the feasibility for its microwave and terahertz applications.
CitationJournal of the European Ceramic Society
DescriptionFrom Elsevier via Jisc Publications Router
History: accepted 2021-07-29, issued 2021-08-02
Article version: AM
Publication status: Accepted
Funder: China Scholarship Council (CSC; Grant(s): 201706370172
Funder: National Natural Science Foundation of China; FundRef: https://doi.org/10.13039/501100001809; Grant(s): 51772019
Funder: oyal Society; Grant(s): NAFR1201126
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