Observation of an anomalous correlation between permittivity and tunability of a doped (Ba,Sr)TiO3 ferroelectric ceramic developed for microwave applications

Kozyrev, Andrey B.; Kanareykin, Alexei D.; Nenasheva, Elizaveta A.; Osadchy, Vitaly N.; Kosmin, Dmitry M.
July 2009
Applied Physics Letters;7/6/2009, Vol. 95 Issue 1, p012908
Academic Journal
Anomalous dependencies of the dynamic (pulse) and static tunability [k(U)=C(0)/C(U)] as a function of permittivity ([variant_greek_epsilon]) were observed in ferroelectric varactors based on doped paraelectric state (Ba,Sr)TiO3 ceramics. The reduction of the relatively high permittivity value from [variant_greek_epsilon]≅810 down to [variant_greek_epsilon]≅260 by introducing various proportions of a Mg2TiO4 additive resulted in a 20% increase in tunability. Furthermore, ceramics with this additive have demonstrated dynamic tunability noticeably higher than the static tunability, also unexpected for this type of material.


Related Articles

  • Experimental and analytical modeling of resonant permittivity and permeability in ferroelectric-ferrite composites in microwave range. Ciomaga, Cristina E.; Balmus, Sorin B.; Dumitru, Ioan; Mitoseriu, Liliana // Journal of Applied Physics;Jun2012, Vol. 111 Issue 12, p124114 

    The ferroelectric-magnetic composite materials are very suitable for designing and producing microwave devices and components, due to their dielectric and magnetic properties. For microwave antennas, sensors, resonators, oscillators, filters, phase shifters, attenuators, and amplifiers, the...

  • Paraelectric in a strong high-frequency field. Sokolov, A. I. // Technical Physics Letters;May2008, Vol. 34 Issue 5, p446 

    A change in the effective permittivity of a ferroelectric film in the paraelectric phase under the action of a strong high-frequency field (nonequilibrium soft mode heating) is considered. It is shown that this effect must be most clearly pronounced far from the resonance (?0[Figure not...

  • Development of a Ferroelectric Based Tunable DLA Structure. Kanareykin, A.; Jing, C.; Nenasheva, E.; Schoessow, P.; Power, J. G.; Gai, W. // AIP Conference Proceedings;1/22/2008, Vol. 1086 Issue 1, p386 

    An experimental demonstration of a tunable Dielectric Loaded Accelerating (DLA) [1] structure is planned using a nonlinear ferroelectric with temperature- or voltage-controllable permittivity. We designed and tested two prototype Ka-band double layer ferroelectric-ceramic structures (cylindrical...

  • Dielectric evidences of core-shell-like effects in nanosized relaxor PbMg1/3Nb2/3O3. Carreaud, Julie; Bogicevic, Christine; Dkhil, Brahim; Kiat, J. M. // Applied Physics Letters;6/16/2008, Vol. 92 Issue 24, p242902 

    Temperature and frequency dependence of dielectric permittivity in nanotextured ceramics of PbMg1/3Nb2/3O3 has been performed in a wide range of grain sizes and shown to display strong variation. In particular, frequency relaxation follows the Vögel Fulcher law for the high grain sizes,...

  • I-V and C-V characteristics of ceramic materials based on barium strontium titanate. Dedyk, A.; Kanareykin, A.; Nenasheva, E.; Pavlova, Ju.; Karmanenko, S. // Technical Physics;Sep2006, Vol. 51 Issue 9, p1168 

    The properties of ferroelectric ceramics based on barium strontium titanate and doped by admixtures with low permittivity and dielectric loss tangent are studied experimentally. These ceramics are viewed as a promising material for microwave devices applied in the acceleration technology....

  • Microwave Losses in Electrodes of Distributed and Lumped Ferroelectric-Based Elements. Vendik, O. G.; Nikol�skii, M. A.; Gashinova, M. S. // Technical Physics Letters;Feb2003, Vol. 29 Issue 2, p130 

    The microwave losses in electrodes of a ferroelectric-based transmission line and a lumped ferroelectric-based element have been theoretically analyzed. The results of calculations of the effective loss tangent for the transmission line are confirmed by a two-dimensional electrodynamic model...

  • Effective electroelastic properties of polycrystalline ferroelectric ceramics predicted by a statistical model. Cheng, J.; Wang, B.; Du, S. // Acta Mechanica;1999, Vol. 138 Issue 3/4, p163 

    The effective electroelastic properties and moduli of ferroelectric ceramics are calculated. Based on a statistical model, the effects of the shape of individual domain and crystallographic domain switching under an external field are firstly taken into consideration to predict the effective...

  • Integrating core/shell ferroelectric nanostructures on silicon substrates.  // Industrial Ceramics;Sep2011, Vol. 31 Issue 2, p160 

    The article reports on the effort of incorporating the core/shell of ferroelectric nanostructures on silicon substrates which can be used in optical and electronic applications.

  • The Switchable Component of Ferroelectric Ceramics Polarization and Pulsed Emission of Electrons. Ivanov, V. N.; Rabkin, L. M. // Technical Physics;Dec2000, Vol. 45 Issue 12, p1553 

    The switchable component of the polarization of ferroelectric ceramics subjected to a pulse electric field was found with the use of the Preisach model. The model parameters were found for PLZT-9/65/35 ceramics from an experimentally found hysteresis loop. The threshold field strength for the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics