Temperature Dependence of Microwave and THz Dielectric Response in Srn + 1TinO3n + 1 (n = 1–4)
| Autor: | D. Noujni, Jan Petzelt, Ian M. Reaney, P. L. Wise, Alexej Pashkin, Viktor Bovtun, Anna-Karin Axelsson, Stanislav Kamba, N McN Alford |
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| Rok vydání: | 2004 |
| Předmět: |
Permittivity
Materials science business.industry Terahertz radiation Infrared Analytical chemistry Soft modes Atmospheric temperature range Condensed Matter Physics Electronic Optical and Magnetic Materials Homologous series chemistry.chemical_compound chemistry Control and Systems Engineering Materials Chemistry Ceramics and Composites Optoelectronics Dielectric loss Electrical and Electronic Engineering business Microwave |
| Zdroj: | Integrated Ferroelectrics. 62:199-203 |
| ISSN: | 1607-8489 1058-4587 |
| Popis: | The microwave, near-millimetre and infrared (IR) dielectric response of Srn + 1TinO3n + 1 (n = 1–4) Ruddlesden-Popper homologous series was studied in the temperature range 10 to 300 K. Remarkable softening of the polar optical mode was observed in Sr4Ti3O10 and Sr5Ti4O13 which explains the increase in microwave permittivity and dielectric loss upon cooling. However, both samples have a distinct content of SrTiO3 dispersed between SrO layers. It is proposed therefore that the observed soft mode originates from the SrTiO3 microscopic inclusions. |
| Databáze: | OpenAIRE |
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