Low temperature dielectric characterization of Mg-doped SrTiO3 thin films prepared by sol-gel
authors Okhay, O; Wu, AY; Vilarinho, PM; Tkach, A
nationality International
journal APPLIED PHYSICS LETTERS
author keywords dielectric losses; dielectric polarisation; ferroelectric materials; ferroelectric thin films; ferroelectricity; magnesium; permittivity; strontium compounds
keywords STRONTIUM-TITANATE; MICROWAVE DEVICES; FERROELECTRICS; IMPURITIES; BEHAVIOR
abstract Voltage dependence of dielectric constant epsilon(') of ferroelectrics and low dielectric loss tan delta of incipient ferroelectrics make them attractive for tuning elements in microwave circuits. In this letter, field dependence of the low-temperature dielectric permittivity and polarization of Mg-doped SrTiO3 films is studied. Incorporation of Mg on both Sr and Ti sites decreases the epsilon(') and relative tunability n(r) of sol-gel derived SrTiO3 films, whereas polarization is reduced by Ti site substitution only. tan delta of the studied films is < 0.012, decreasing at low temperatures down to 0.001 when Ti is substituted by 5% of Mg.
publisher AMER INST PHYSICS
issn 0003-6951
year published 2010
volume 96
issue 15
digital object identifier (doi) 10.1063/1.3360213
web of science category Physics, Applied
subject category Physics
unique article identifier WOS:000276794100052
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journal impact factor 3.597
5 year journal impact factor 3.4
category normalized journal impact factor percentile 76.299
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