Electrical Properties of Mg Doped (Ba0.5Sr0.5)TiO3 Thin Films

Yoon, Ki Hyun; Lee, Jae Chan; Park, Jihoon; Kang, Dong Heon; Song, Chul-Gyu; Seo, Yong Gyo

doi:10.1143/jjap.40.5497

Cited by 54 publications

(37 citation statements)

References 15 publications

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“…This two-folded effect would lead to the diffraction peaks hardly shift [11]. It was observed that Mg 2+ ions initially entered into the A sites of perovskite structure, then into the B sites when the Mg 2+ concentration exceeds 5 at% in the barium strontium titanate and up to the solubility limit (~15 at%) [12]. The concentration of Mg 2+ in our samples preponderates over the solubility limit of Mg 2+ in BaTiO 3 , so the diffraction peak position does not change when the content of BaMg 6 Ti 6 O 19 increases from 10 to 60 wt%.…”

Section: Resultsmentioning

confidence: 99%

Dielectric tunability and microwave properties of Ba0.5Sr0.5TiO3-BaMg6Ti6O19 composite ceramics for tunable microwave device applications

et al. 2011

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Ba 0.5 Sr 0.5 TiO 3 -BaMg 6 Ti 6 O 19 microwave composite ceramics with low dielectric constant and relatively high tunability were fabricated via the solid-state reaction method. The microstructures and microwave dielectric properties of the composite ceramics have been investigated. BaMg 6 Ti 6 O 19 and Ba 0.5 Sr 0.5 TiO 3 can be friendly coexistent in the composite material system without obvious chemical reactions. With increasing content of BaMg 6 Ti 6 O 19 from 10 wt.% to 60 wt.%, the dielectric anomalous peaks of ferroelectric-paraelectric phase transition for the composite ceramics are suppressed and broadened. The dielectric constant can be effectively tailored from 2035 to 129. For composite ceramics with 60 wt.% content of BaMg 6 Ti 6 O 19 , the dielectric loss still keeps around 0.002 and the tunability is 13.4% measured at a dc-applied electric field of 30 kV/cm. The Q value of composite ceramics with 20 wt.% content BaMg 6 Ti 6 O 19 is 367 and the dielectric constant is cut down to 665 at the microwave band of 1.579 GHz.

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Section: Resultsmentioning

confidence: 99%

Dielectric tunability and microwave properties of Ba0.5Sr0.5TiO3-BaMg6Ti6O19 composite ceramics for tunable microwave device applications

et al. 2011

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“…The NiO-BaTiO 3 composites had been reported by some researchers [2][3][4][5][6][7][8][9]. It is indicated that Ni 2+ reduces the dielectric loss and leakage-current particularly [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…It is indicated that Ni 2+ reduces the dielectric loss and leakage-current particularly [5][6][7]. And the NiO inclusion inhibits the grain growth of BaTiO 3 observably [8,9], although only a small amount of Ni 2+ can dissolve into the perovskite phase of BaTiO 3 .…”

Section: Introductionmentioning

confidence: 99%

Effect of doped Ni2+ on the dielectric properties of NiO-BaTiO3 composites

Huang

Weng

et al. 2007

J Electroceram

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NiO-BaTiO 3 composites were prepared by sintering BaTiO 3 together with NiO in air at 1300°C. Microstructure and morphology of the composites were detected by XRD and SEM, and the dielectric properties were measured by LCZ meter. The results indicate that the perovskite phase is formed in fact in status of solid solution doped with Ni 2+ , although only a small amount of Ni ions can dissolve into the perovskite phase. Ni doping decreases the formation temperature of the composite without inhibiting the grain growth of the crystalline phase. The dielectric constant decreases sharply and the dielectric loss decreases smoothly with increasing Ni 2+ below NiO addition of 0.5 wt.%. When NiO addition increases above 0.5 wt.%, the dielectric constant and loss correlate with mixing rule of the two phases. Meanwhile, the replacement of Ni 2+ for Ti 4+ decreases the Curie temperature of perovskite phase by 30°C.

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“…Wang et al [8] also found an increase in the dielectric constant of the multilayer films with a decrease in the sublayer thickness. Yoon et al [9] found that a high dielectric constant and low leakage current could be obtained in BSTM/BST/BSTM multilayered films by adjusting the thickness of the sublayers.…”

Section: Introductionmentioning

confidence: 99%

Effect of uniform and periodic doping by Ce on the properties of barium strontium titanate thin films

et al. 2007

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A significant decrease in the dielectric loss and leakage current by introducing Ce in small amounts into BST thin films is demonstrated. The other effects of Ce doping are a lowering of the dielectric constant and a lower temperature coefficient of dielectric constant. In films containing a periodic fluctuation of Ce concentration through the thickness, prepared using a multilayer approach, the dielectric loss is further reduced. The periodicity of the composition is shown to have a significant effect on the properties. The properties of the multilayer films are seen to be significantly different from the single layer films of corresponding average composition.

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Electrical Properties of Mg Doped (Ba_0.5Sr_0.5)TiO₃ Thin Films

Cited by 54 publications

References 15 publications

Dielectric tunability and microwave properties of Ba0.5Sr0.5TiO3-BaMg6Ti6O19 composite ceramics for tunable microwave device applications

Dielectric tunability and microwave properties of Ba0.5Sr0.5TiO3-BaMg6Ti6O19 composite ceramics for tunable microwave device applications

Effect of doped Ni2+ on the dielectric properties of NiO-BaTiO3 composites

Effect of uniform and periodic doping by Ce on the properties of barium strontium titanate thin films

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