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The MagLab is funded by the National Science Foundation and the State of Florida.

Dielectric Measurements in DC Fields

Dielectric capacitance measures capacitance and dissipation of a bulk or thin film sample.

The measurement (tan δ) is performed using capacitance bridges, which automatically or manually balances the capacitance and dissipation of the sample with known standards. When a sample is prepared to a parallel capacitor geometry, the capacitance and the dissipation can be converted to real and imaginary part of dielectric constant (ε′ and ε″ respectively) using relations of C=ε0 ε′ Area ⁄ (thickness) and tan δ= ε″ ⁄ ε′ , where ε0 is permittivity of air.

Instrumentation

  • Andeen-Hagerling Model 2700A capacitance bridge (50 – 20 kHz)
  • General Radio 1615A capacitance bridge (50 – 10 kHz)

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Images & Sample Data

Credit: National MagLab

Related Publications

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Lee, et al, Series of phase transitions and multiferroicity in the quasi-two-dimensional spin-1/2 triangular lattice antiferromagnet Ba3CoNb2O9, Physical Review B, 89 (2014) Read online.


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Silverstein, H. J., et al, Pb3TeCo3V2O14: A Potential Multiferroic Co Bearing Member of the Dugganite Series, Chem. Mater., 24 (2012) Read online.


Samantaray, R., et al, Elucidating the Mechanism of Multiferroicity in (NH4)3Cr (O2)4 and its Tailoring by Alkali Metal Substitution, J. Am. Chem. Soc., (2012) Read online.


Iyama, A., et al, High-magnetic field effect on interplay between Sm 4f and Mn 3d moments in SmMnO3, Journal of the Physical Society of Japan, 81 (2012) Read online.


Hwang, J., et al, Magnetic transitions and magnetodielectric effect in antiferromagnet SrNdFeO4, Physical Review B, 85 (2012) Read online.


Hwang, J., et al, Magnetoelectric effect in NdCrTiO5, Phys. Rev. B, 85 (2012) Read online.


Hwang, J., et al, Successive Magnetic Phase Transitions and Multiferroicity in the Spin-One Triangular-Lattice Antiferromagnet Ba3NiNb2O9, Physical Review Letters, 109 (2012) Read online.


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Staff Contact

Eun Sang Choi


Last modified on 26 December 2022

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