Dielectric properties of Sb2O3 films

Karpovich, I. A.; Fedoseeva, N. V.

doi:10.1007/bf00814845

Soviet Physics Journal

1969

DOI: 10.1007/bf00814845

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Dielectric properties of Sb2O3 films

I. A. Karpovich¹,

N. V. Fedoseeva²

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Cited by 2 publications

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“…When normalizing V B by the nanoflake thickness, breakdown strength (E B ) could be The experimentally confirmed E B is in the range of 1.4∼2.5 MV/cm, comparable with those of the semi-amorphous α-Sb 2 O 3 polycrystalline films. 10,11 Distinctively, the nanoflake E B is independent of the thickness, probably because of the defectfree virtue. Above all, the E B > 1 MV/cm qualifies α-Sb 2 O 3 as an interlayer dielectric.…”

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confidence: 99%

“…It is thermally stable up to ∼550 °C and has a wide application such as flame retardant. In literature, the k values of the polycrystalline α-Sb 2 O 3 films vary widely from 5 to 13. − Such a polycrystalline film is a matrix of the glass phase Sb 2 O 3 , in which α-Sb 2 O 3 nanograins are embedded. ,− The inconsistency in the amorphous degree of the glass phase is a reason for the obvious k disagreement. Although these studies were carried out nearly a half-century ago, the α-Sb 2 O 3 dielectric nature remains unknown, probably because of a scarcity of single crystalline sample.…”

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confidence: 99%

“…The breakdown strength criterion is marked by the green dashed line. Data of the semi-amorphous α-Sb 2 O 3 polycrystalline films in refs and are included for comparison.…”

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Inorganic Low k Cage-molecular Crystals

Peng

et al. 2020

Nano Lett.

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For the interlayer dielectric in microelectronics, light element compounds are preferably accepted due to less electronic polarization. Here, the nontrivial dielectric nature of the Sb 4 O 6 cage-molecular crystal, known as α-antimony trioxide (α-Sb 2 O 3 ), is reported. The gas-phase synthesized α-Sb 2 O 3 nanoflakes are of high crystal quality, from which the abnormal local admittance responses were revealed by scanning microwave impedance microscopy (sMIM). The remarkably low dielectric constant (k), 2.0∼2.5, is corroborated by the analysis of the thickness-dependent sMIM-capacitance signal. In light of the theoretical calculations, the ultralow molecular density and the significantly suppressed ionic polarization are both crucial to the highly reduced k. Combining with the excellent optical band gap, thermal stability, and breakdown strength, α-Sb 2 O 3 is a promising low k dielectric. KEYWORDS: low k, α-Sb 2 O 3 , Sb 4 O 6 cage, molecular crystal, interlayer dielectric

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Inorganic Low k Cage-molecular Crystals

Peng

et al. 2020

Nano Lett.

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Nonlinear force-free models for the solar corona

Régnier

Priest

2007

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Context. With the development of new instrumentation providing measurements of solar photospheric vector magnetic fields, we need to develop our understanding of the effects of current density on coronal magnetic field configurations. Aims. The object is to understand the diverse and complex nature of coronal magnetic fields in active regions using a nonlinear forcefree model. Methods. From the observed photospheric magnetic field we derive the photospheric current density for two active regions: one is a decaying active region with strong currents (AR8151), and the other is a newly emerged active region with weak currents (AR8210). We compare the three-dimensional structure of the magnetic fields for both active region when they are assumed to be either potential or nonlinear force-free. The latter is computed using a Grad-Rubin vector-potential-like numerical scheme. A quantitative comparison is performed in terms of the geometry, the connectivity of field lines, the magnetic energy and the magnetic helicity content. Results. For the old decaying active region the connectivity and geometry of the nonlinear force-free model include strong twist and strong shear and are very different from the potential model. The twisted flux bundles store magnetic energy and magnetic helicity high in the corona (about 50 Mm). The newly emerged active region has a complex topology and the departure from a potential field is small, but the excess magnetic energy is stored in the low corona and is enough to trigger powerful flares.

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Dielectric properties of Sb2O3 films

Cited by 2 publications

References 5 publications

Inorganic Low k Cage-molecular Crystals

Inorganic Low k Cage-molecular Crystals

Nonlinear force-free models for the solar corona

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