Work

Enhanced Microwave Commutation Quality Factor of Tunable Capacitors Based on SrTiO3 Thin Films

Year: 2025

Type: article

Abstract: Thin films of strontium titanate were grown on a polycrystalline aluminum oxide substrate using magnetron sputtering. These films exhibit high structural quality and nonlinear properties, which make them promising for microwave applications. Planar capacitors based on SrTiO3 films demonstrated a tunability of 1.65 with a microwave Q-factor of at least 110 in the entire range of control voltages without deterioration of losses, and a slow capacitance relaxation level no more than 4%, which is significantly better than currently published data for planar ferroelectric elements. This is the first successful attempt to create a planar SrTiO3 capacitor on an alumina, which demonstrates a commutation quality factor CQF of 3300 at microwaves.

Source: Molecules

DOI: 10.3390/molecules30234593

Authors: Andrei Tumarkin, Alexey Bogdan, Eugeny Sapego, Oleg Korepanov, Artem Karamov

Institution: Saint Petersburg State Electrotechnical University

Language: English

Topic: Ferroelectric and Piezoelectric Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,258

Funder: Ministry of Education and Science of the Russian Federation