Studies on electrical and dielectric properties of Ba1−xSrxTiO3

Patil, D. R.; Lokare, S.A.; Devan, Rupesh S.; Chougule, S.S.; Kanamadi, C.M.; Kolekar, Y. D.; Chougule, B.K.

doi:10.1016/j.matchemphys.2007.02.027

Cited by 88 publications

(32 citation statements)

References 5 publications

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“…The tetragonality ratio is found to be the highest in the films grown on epitaxial Pt layer. The c/a ratio obtained for the films grown on epitaxial substrate is similar to the values found in literature for bulk BST [13][14][15] and is slightly lower than the values obtained in the BST films grown on MgO substrate. 16 For a qualitative characterization of the films orientation, the following equation was used: 17…”

Section: -2supporting

confidence: 86%

Effect of Pt bottom electrode texture selection on the tetragonality and physical properties of Ba0.8Sr0.2TiO3 thin films produced by pulsed laser deposition

Silva¹,

Sekhar²,

Almeida³

et al. 2012

Journal of Applied Physics

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Electric field induced instabilities of thin leaky bilayers: Pathways to unique morphologies and miniaturization J. Chem. Phys. 138, 024705 (2013) Electric field-tunable BaxSr1−xTiO3 films with high figures of merit grown by molecular beam epitaxy Appl. Phys. Lett. 101, 252906 (2012) The penetration limit of poly(4-vinyl phenol) thin films for etching via holes by inkjet printing Appl. Phys. Lett. 101, 253302 (2012) The penetration limit of poly(4-vinyl phenol) thin films for etching via holes by inkjet printing APL: Org. Electron. Photonics 5, 270 (2012) Numerical simulations of electrostatic interactions between an atomic force microscopy tip and a dielectric sample in presence of buried nano-particles J. Appl. Phys. 112, 114313 (2012) Additional information on J. Appl. Phys. The effect of platinum (Pt) bottom electrode texture on the tetragonality, dielectric, ferroelectric, and polarization switching response of pulsed laser deposited Ba 0.8 Sr 0.2 TiO 3 (BST) thin films has been studied. The x-ray diffraction and Raman analysis revealed the higher tetragonality of BST films when they were grown on higher (111) textured Pt layer. The properties like dielectric permittivity, polarization, switching time, and leakage currents were found to be correlated to tetragonality and orientation of the BST films. The polarization current was observed to be higher in BST films on Pt epitaxial layer and it exhibits exponential dependence on the electric field. The voltage-current measurements displayed Ohmic behavior of leakage current irrespective of Pt texture for low voltages (up to 1 V), whereas at higher voltages the conduction mechanism was found to be dependent on texture selection of bottom Pt electrode. V C 2012 American Institute of Physics. [http://dx

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Section: -2supporting

confidence: 86%

Effect of Pt bottom electrode texture selection on the tetragonality and physical properties of Ba0.8Sr0.2TiO3 thin films produced by pulsed laser deposition

Silva¹,

Sekhar²,

Almeida³

et al. 2012

Journal of Applied Physics

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“…The AC conductivity can be calculated by using the following formula: where ε is the dielectric constant, ε 0 is the permittivity of free space (8.85 × 10 −14 F/cm), tanδ is the loss tangent and ω is the angular frequency (i.e. ω =2πf) [36].…”

Section: Ac Conductivitymentioning

confidence: 99%

Structural and electrical properties of barium titanate (BaTiO3) thin films obtained by spray pyrolysis method

Kumbhar

Mahadik

Chougule

et al. 2015

Materials Science-Poland

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Barium titanate (BaTiO 3 ) thin films have been prepared using the spray pyrolysis method. The films were deposited onto a glass substrate at varying substrate temperature ranging from 250 to 350°C with the interval of 50°C. The structural, morphological, electrical and dielectric properties of the deposited films have been studied. The X-ray diffraction pattern confirmed the polycrystalline nature of the films with a cubic crystal structure. X-ray photoelectron spectroscopy (XPS) showed a good agreement of the thin films stoichiometry with BaTiO 3 . A presence of Ba, Ti and O in the BaTiO 3 thin films was observed by energy dispersive X-ray analysis. The scanning electron microscopy (SEM) showed the heterogeneous distribution of cubical grains all over the substrate. The grain size decreased with an increase in substrate temperature. The dielectric constant and dielectric loss showed the dispersion behaviour as a function of frequency, measured in the frequency range of 20 Hz to 1 MHz. The AC conductivity (σ ac ) measurement showed the linear nature of obtained films, which confirms conduction mechanism due to small polarons. Impedance spectroscopy has been used to study the electrical behaviour of BaTiO 3 ferroelectric thin films. The ferroelectric hysteresis loop has been recorded at room temperature.

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“…where, e r and are the dielectric constant, C is the capacitance of the material, d is the thickness of the pellet and A is the area of cross-section and e 0 permittivity of free space [13,14].…”

Section: Resultsmentioning

confidence: 99%

Dielectric switching above a critical frequency occured in iron mullite composites used as an electronic substrate

Paul

Halder

Roy

et al. 2014

J Mater Sci: Mater Electron

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Highly crystallized mullite is synthesized via sol-gel technique in presence of iron of different concentrations at different temperature. FTIR spectroscopy, XRD and FESEM characterization showed prominent mullite phase which is found to depend on the concentrations of Fe 2? ions. The phase evolution and electrical properties like dielectric constant, tangent loss, a.c. conductivity and resistivity of the composites with increasing concentration of the doped metal at different temperature have been studied. The results showed a decrease in mullite phase up to 1.2 (M) which is mainly responsible for the increasing dielectric behavior with respect to undoped mullite. The hematite phase continued to increase with increasing doping concentration. The dielectric constant decreased with frequency for all the samples attaining constancy at higher frequency, which is normal behavior for dielectric ceramics. A.c. conductivity increased with frequency following Jonscher's power law and was found to depend on the amount of glassy phase and concentration of mobile ions present in the composites. The composite showed a minimum dielectric constant of 33.69 at 1.2 (M) concentration of iron at 2 MHz. Thus due to their good dielectric response the composite may widely be used use as electronic substrates like packaging materials for integrated high speed circuits, multilayer capacitors, high voltage insulators etc.

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Studies on electrical and dielectric properties of Ba1−xSrxTiO3

Cited by 88 publications

References 5 publications

Effect of Pt bottom electrode texture selection on the tetragonality and physical properties of Ba0.8Sr0.2TiO3 thin films produced by pulsed laser deposition

Effect of Pt bottom electrode texture selection on the tetragonality and physical properties of Ba0.8Sr0.2TiO3 thin films produced by pulsed laser deposition

Structural and electrical properties of barium titanate (BaTiO3) thin films obtained by spray pyrolysis method

Dielectric switching above a critical frequency occured in iron mullite composites used as an electronic substrate

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