Effect of Fe Doping of Thin (Ba,Sr)TiO<sub>3</sub>Films on Increase in Dielectric Constant

Imai, Ketaro; Takeno, Shiro; Nakamura, Kinya

doi:10.1143/jjap.41.6060

Cited by 24 publications

(15 citation statements)

References 2 publications

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“…BST thin films have also been widely investigated for microwave applications such as phase shifters, tunable filters, tunable resonators, and switches [26][27][28][29][30]. Metal ion-doped BST samples, including thin films and ceramics, have also been investigated [31][32][33][34][35][36][37][38]. Especially, concerning Fe-doped Ba x Sr 1 À x TiO 3 samples, the overwhelming majority focus on BSTF thin films [34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

“…Metal ion-doped BST samples, including thin films and ceramics, have also been investigated [31][32][33][34][35][36][37][38]. Especially, concerning Fe-doped Ba x Sr 1 À x TiO 3 samples, the overwhelming majority focus on BSTF thin films [34][35][36][37][38]. One typical example is the fact that Fe doping of BST films is remarkably effective in suppressing decreasing dielectric constant, and BST films show a minimum dielectric loss with varied Fe doping concentration [34].…”

Section: Introductionmentioning

confidence: 99%

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Structural and multiferroic properties of Fe-doped Ba0.5Sr0.5TiO3 solids

Guo

Pan

et al. 2013

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural and multiferroic properties of Fe-doped Ba0.5Sr0.5TiO3 solids

Guo

Pan

et al. 2013

Journal of Magnetism and Magnetic Materials

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“…A very promising approach for this purpose is to use aliovalent dopant ions on the Ti 4+ site as acceptor or on the [Ba, Sr] 2+ -site as donor to achieve a significant increase of the performance by impacting the defect chemistry of the thin film. In consequence, a great deal of effort has been spent in recent years to develop strategies to dope BST with small amounts of Mg, Al, Ni, Mn, La, Nb, and Fe [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Characterization of non-stoichiometric co-sputtered Ba0.6Sr0.4(Ti1 − x Fe x )1 + x O3 − δ thin films for tunable passive microwave applications

et al. 2011

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The fabrication of novel iron-doped barium strontium titanate thin films by means of radio frequency (RF) magnetron co-sputtering is shown. Investigations of the elemental composition and the dopant distribution in the thin films obtained by X-ray photoelectron spectroscopy, Rutherford backscattering spectrometry, and time-of-flight secondary ion mass spectroscopy reveal a homogeneous dopant concentration throughout the thin film. The incorporation of the iron dopant and the temperature-dependent evolution of the crystal structure and morphology are analyzed by electron paramagnetic resonance spectroscopy, X-ray diffraction, Raman spectroscopy, atomic force microscopy, and scanning electron microscopy. In summary, these results emphasize the RF magnetron co-sputter process as a versatile way to fabricate doped thin films.

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“…Ba 1-x Sr x TiO 3 has Ba and Sr as A site and Ti as B site. Acceptors ions like Iron (Fe) are advantageous to replace Titanium (Ti) in B-site for the formation of single-phase structure which results in further ionization of Fe ions and leads to the appearance of vacancies and lattice defects [17].…”

Section: Introductionmentioning

confidence: 99%

Structural and dielectric properties of iron doped barium strontium titanate for storage applications

Saeed

Balachandran

Wong

et al. 2015

J Mater Sci: Mater Electron

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Barium strontium titanate (BST) and iron doped barium strontium titanate (BSTF) ceramics with general formula (Ba 0.5 Sr 0.5 Ti 1-y Fe y O 3 ) and different iron (Fe) contents were prepared by slow rate injection sol-gel technique. The phase analysis, morphology and dielectric properties of BSTFs were investigated. The phase analysis was carried out using XRD which revealed the crystallization of BSTF in perovskite structure with single phase. The Fe doped BST peaks shifted toward higher angles and the calculated crystallite size was 19 nm on average. The BSTF morphology was studied using TEM which showed that the particle size was affected by Fe content. The average particle size was found to be 37 nm for (Ba 0.5 Sr 0.5 Ti 1-y Fe y O 3 ) with Fe concentration of (y = 0.01, 0.05 and 0.1) calcined at (600, 800 and 1000°C). The dielectric measurements were carried out using impedance analyzer at room temperature as a function of frequency in the range of 10 Hz to 1 MHz. The dielectric constant and dielectric loss of the 1 mol% Fe-doped Ba 0.5 Sr 0.5 TiO 3 at 1 kHz were 1453.69 and 0.0063, respectively. The BSTF ceramics with high dielectric constant and low dielectric loss were obtained for the application DRAM cell capacitor.

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Effect of Fe Doping of Thin (Ba,Sr)TiO₃Films on Increase in Dielectric Constant

Cited by 24 publications

References 2 publications

Structural and multiferroic properties of Fe-doped Ba0.5Sr0.5TiO3 solids

Structural and multiferroic properties of Fe-doped Ba0.5Sr0.5TiO3 solids

Characterization of non-stoichiometric co-sputtered Ba0.6Sr0.4(Ti1 − x Fe x )1 + x O3 − δ thin films for tunable passive microwave applications

Structural and dielectric properties of iron doped barium strontium titanate for storage applications

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Effect of Fe Doping of Thin (Ba,Sr)TiO3Films on Increase in Dielectric Constant

Cited by 24 publications

References 2 publications

Structural and multiferroic properties of Fe-doped Ba0.5Sr0.5TiO3 solids

Structural and multiferroic properties of Fe-doped Ba0.5Sr0.5TiO3 solids

Characterization of non-stoichiometric co-sputtered Ba0.6Sr0.4(Ti1 − x Fe x )1 + x O3 − δ thin films for tunable passive microwave applications

Structural and dielectric properties of iron doped barium strontium titanate for storage applications

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Effect of Fe Doping of Thin (Ba,Sr)TiO₃Films on Increase in Dielectric Constant