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A Computational Approach to Examine the Dielectric Properties of Novel Dielectric Fe2TiO5

Gurpreet Singh, 17

The Bronx High School of Science

ABSTRACT
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ABSTRACT

The polarization of dielectrics through the use of an applied electric field  is crucial in a myriad of applications, particularly within the use of capacitors. The efficacy of these capacitors, which are virtually found in every electronic device, can be increased through research of dielectrics, particularly those with prominent dielectric constants and activation energies, an exemplification of how much energy can be stored. One dielectric in particular, Fe2TiO5, inhabits these properties, but the limited research is inherently flawed such that it uses polycrystalline material with different crystal orientations and asymmetrical directions. My project, under the supervision of Professor Arthur P. Ramirez and Maverick McLanahan, examines the dielectric properties of  Fe2TiO5  under a single, pure crystal analysis of the ab and c axis. By creating a parallel plate capacitor linked to a Quantum Design Physical Properties Measurement System and LCR meter, the complex dielectric permittivity was found as a function of temperature from 150 K to 300 K at different frequencies and dielectric constant was derived from capacitance by using the thickness and area of the capacitor. An analysis of the real and imaginary dielectric constant revealed substantial dielectric effects within the C axis and peaks within the dissipation factor showed evidence of dielectric relaxer, exemplifying potential of usage within more efficient capacitors and electronics. The peak was fitted to the Arrhenius equation which gave activation energy values pointing to correlated barrier hopping mechanisms. This research lies as the framework for future studies of the transport dynamics to explain the large dielectric constant present within Fe2TiO5.

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