Journal article
Ultrahigh anharmonicity low-permittivity tunable nanocrystalline thin-film BaTi2O5
Acta materialia, v 208, 116712
15 Apr 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Electrically tunable dielectric thin films in active circuits and systems are challenged by capacitance-induced delays and impedance matching requiring a lower dielectric constant. Here an approach to increasing the intrinsic tunability of compounds containing TiO6 octahedra by considering the influence of different connectivity among these octahedra is presented. Such connectivity variants in nanocrystalline monoclinic BaTi2O5 thin films enable a two orders of magnitude enhancement in Ti anharmonic interaction, thereby permitting a ≈65% decrease in dielectric constant to 70 at room temperature without sacrificing tunability. Edge-sharing TiO6 octahedra possess a much shorter Ti-Ti distance of only 2.91 Å as compared to the perovskite structure (~4 Å), permitting large field-induced structural re-arrangement and intrinsic tunability.
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Details
- Title
- Ultrahigh anharmonicity low-permittivity tunable nanocrystalline thin-film BaTi2O5
- Creators
- Matthias Falmbigl - Drexel UniversityIryna S. Golovina - Drexel UniversityChristopher J. Hawley - Drexel UniversityAleksandr V. Plokhikh - Drexel UniversityOr Shafir - Bar-Ilan UniversityIlya Grinberg - Bar-Ilan UniversityJonathan E. Spanier - Drexel University
- Publication Details
- Acta materialia, v 208, 116712
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000636045300018
- Scopus ID
- 2-s2.0-85101982415
- Other Identifier
- 991019168117504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering