2015/08/30 by Maxim Goryachev, Goryachev, Maxim, Lingfei Zhao +10 · 2 citations
Chemistry · Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Anisotropy #Condensed matter physics #Dielectric #Electric field #Electrostatics and Colloid Interactions #FOS: Physical sciences #Ferroelectric and Piezoelectric Materials #Geophysical and Geoelectrical Methods #Isotropy #Materials Science (cond-mat.mtrl-sci) #Materials science #Nuclear magnetic resonance #Optics #Optoelectronics #Permittivity #Physics #Quantum Physics (quant-ph) #Relative permittivity #Strontium titanate #Transverse plane #Vacuum permittivity #cond-mat.mtrl-sci #quant-ph
paper · pdf · doi:10.48550/arxiv.1508.07550
published in arXiv (Cornell University) (Cornell University)
arxiv created 2015/08/30 · openalex publication_date 2015/08/30 · arxiv updated 2015/09/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The dielectric properties of strontium titanate (SrTiO3) have previously been reported from room temperature to low temperatures with conflicting results. In this work, precision measurement of the permittivity is undertaken by simultaneously measuring transverse electric and transverse magnetic resonant modes within a single crystal. It is unequivocally shown that the permittivity is isotropic at room temperature with a permittivity of order 316.3±2.2 by measuring multiple modes of different electric field polarisations. As the crystal is cooled to 5 K and undergoes well known phase transitions, we show the material becomes uniaxial anisotropic with the ratio of the parallel to perpendicular permittivity to the cylinder z-axis of the sample as high as 2.4 below 6 K.