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Abstract <p>Here we present the study of the complex permittivity of the Sr<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({}_{0.75}\)</EquationSource> <!--OptelIns2570059Rybak-m1--> </InlineEquation>Ba<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\({}_{0.25}\)</EquationSource> <!--OptelIns2570059Rybak-m2--> </InlineEquation>Nb<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\({}_{2}\)</EquationSource> <!--OptelIns2570059Rybak-m3--> </InlineEquation>O<InlineEquation ID="IEq4"> <EquationSource Format="TEX">\({}_{6}\)</EquationSource> <!--OptelIns2570059Rybak-m4--> </InlineEquation> ferroelectric crystal below 1 THz in the temperature range from <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\({+}25\)</EquationSource> <!--OptelIns2570059Rybak-m5--> </InlineEquation> to <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\({+}200^{\circ}\)</EquationSource> <!--OptelIns2570059Rybak-m6--> </InlineEquation>C. Notwithstanding that the relaxor is undergoing a phase transition, we have shown that the dielectric properties change slightly. A high level of stability of the dielectric permittivity was revealed for the nonpolar axis, while for the polar one it was less than 15<InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(\%\)</EquationSource> <!--OptelIns2570059Rybak-m7--> </InlineEquation>. The estimated terahertz electro-optic coefficient of the crystal shows the potential for the Cherenkov-type terahertz generation.</p>

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Temperature Dependence of Millimeter-Wave Dielectric Dispersion in SBN-75

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • A. A. Rybak,
  • V. D. Antsygin,
  • S. A. Kuznetsov,
  • S. L. Mikerin,
  • N. A. Nikolaev

摘要

Abstract

Here we present the study of the complex permittivity of the Sr \({}_{0.75}\) Ba \({}_{0.25}\) Nb \({}_{2}\) O \({}_{6}\) ferroelectric crystal below 1 THz in the temperature range from \({+}25\) to \({+}200^{\circ}\) C. Notwithstanding that the relaxor is undergoing a phase transition, we have shown that the dielectric properties change slightly. A high level of stability of the dielectric permittivity was revealed for the nonpolar axis, while for the polar one it was less than 15 \(\%\) . The estimated terahertz electro-optic coefficient of the crystal shows the potential for the Cherenkov-type terahertz generation.