Effect of Vanadium Substitution on the Dielectric Properties of Glass Ceramic Bi-2212 Superconductor

Çavdar, Şükrü; Koralay, Haluk; Altındal, Ş.

doi:10.1007/s10909-011-0361-1

Cited by 24 publications

(7 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The negative capacitance (NC) effect is an advantage that indicates the applicability of the Au/As 2 Se 3 devices as microwave filters, as parasitic capacitance cancellers, and as noise reducers . The experimental data of the capacitance spectra can be reproduced by the Qasrawi–Ershov approach for AC conduction which assumes that the propagating electrical signals oscillate against already‐existing oscillatory dipoles which exhibit electron‐ and hole‐coupled plasmons of frequencies of

w_{normaln}

and

w_{normalp}

, respectively. This approach of oscillatory signals assumes that the capacitance frequency dependence follows the relation

C (w) = C_{normalo} + C_{1} = C_{normalo} + \frac{a_{normaln} τ_{normaln}}{1 + {(w - w_{n})}^{2} τ_{normaln}^{2}} - \frac{a_{normalp} τ_{normalp}}{1 + {(w - w_{p})}^{2} τ_{normalp}^{2}}

…”

Section: Resultsmentioning

confidence: 99%

Characterization of Au/As₂Se₃ Multifunctional Tunneling Devices

Qasrawi

2020

Physica Status Solidi (a)

View full text Add to dashboard Cite

Herein, the physical design and characterization of the Au/As2Se3 Schottky barrier that is prepared under a vacuum pressure of 10−5 mbar are reported. The Schottky diodes are characterized by means of X‐ray diffraction, energy‐dispersive X‐ray spectroscopy, current–voltage characteristics, and conductivity, capacitance, and impedance spectroscopy. It is observed that the Schottky barriers exhibit a biasing‐dependent large rectification ratio with current conduction mechanisms dominated by the electric field‐assisted quantum mechanical tunneling through a barrier height of 0.29 eV and depletion width of 13.3 nm. While the spectral analysis of the alternating current (AC) conductivity reveals mixed conduction with the contribution of both of the tunneling and correlated barriers hopping mechanisms, the capacitance spectra display resonance–antiresonance phenomena at 0.201 GHz. A wide range (0.21–1.80 GHz) of negative capacitance (NC) effects is observed in devices. In addition, the impedance spectroscopy analyses show that the Au/As2Se3 devices exhibit band‐stop features with a notch frequency of 1.14 GHz and return loss value of 16 dB. The NC effect, resonance–antiresonance, filtering features, as well as the high rectification ratio at a relatively low biasing voltage (≈0.30 V) nominate the Au/As2Se3 devices for applications which require noise reduction, parasitic effect cancellations, and microwave filtering.

show abstract

w_{normaln}

and

w_{normalp}

, respectively. This approach of oscillatory signals assumes that the capacitance frequency dependence follows the relation

C (w) = C_{normalo} + C_{1} = C_{normalo} + \frac{a_{normaln} τ_{normaln}}{1 + {(w - w_{n})}^{2} τ_{normaln}^{2}} - \frac{a_{normalp} τ_{normalp}}{1 + {(w - w_{p})}^{2} τ_{normalp}^{2}}

…”

Section: Resultsmentioning

confidence: 99%

Characterization of Au/As₂Se₃ Multifunctional Tunneling Devices

Qasrawi

2020

Physica Status Solidi (a)

View full text Add to dashboard Cite

show abstract

“…It arises when shifting of electronic charge clouds of atoms and ions takes place. This is observed at very high frequencies such as 10 16 Hz, i.e., in ultra violet optical region.…”

Section: Introductionmentioning

confidence: 93%

“…The charge reservoir layer, inter-grain boundaries, and micro-cracks act as dielectric media, which can be polarized by the displacement of charge carriers with the assistance of an external electric field from their equilibrium position. The material may undergo four primary mechanisms of polarization [13][14][15][16] each of which involves a short-range motion of charges and subsidizes to the total polarization of the material: · Electronic polarization ( e  ). It arises when shifting of electronic charge clouds of atoms and ions takes place.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of (Zn) x /CuTl-1223 nanoparticle-superconductor composites

et al. 2016

View full text Add to dashboard Cite

Zinc (Zn) nanoparticles and (Cu 0.5 Tl 0.5 )Ba 2 Ca 2 Cu 3 O 10δ (CuTl-1223) superconducting phase were prepared separately by sol-gel and solid-state reaction methods, respectively. Zn nanoparticles were added in CuTl-1223 superconducting matrix with different weight percentage during the final sintering process to obtain (Zn) x /CuTl-1223 (x = 0-4 wt%) nanoparticle-superconductor composites. The effect of Zn nanoparticles on structural, morphological, superconducting, and dielectric properties of CuTl-1223 phase was investigated. The addition of these Zn nanoparticles has not affected the crystal structure of host CuTl-1223 superconducting phase. Superconducting properties were enhanced after the addition of Zn nanoparticles up to certain optimum content (i.e., x = 1 wt%), which were due to improved inter-grain connectivity by healing up of micro-cracks and reduction of defects like oxygen deficiencies, etc. The activation energy (U) was increased after the addition of Zn nanoparticles in CuTl-1223 phase. The dielectric properties of these samples (i.e., dielectric constant, dielectric loss) were determined by experimentally measured capacitance (C) and conductance (G) as a function of frequency at room temperature. The addition of metallic Zn nanoparticles in CuTl-1223 matrix has overall suppressed the dielectric parameters of (Zn) x /CuTl-1223 nanoparticlesuperconductor composites. The metallic Zn nanoparticles played a significant role in inter-grain couplings by filling the voids and pores.

show abstract

“…These materials are engineering materials that are used in some special applications because of their hardness, corrosion resistance, oxidation, strength to corrosion and high temperature, dimensional stabilities, optical and other transmission characteristics as well as good electrical properties [4]. Some of these applications include superconductivity, biomedical applications, applications requiring high dielectric constant, material connections and substrates for electronics [5,6]. Moreover, the glass-ceramic * E-mail: atasci@kastamonu.edu.tr materials are used in aerospace and aviation industry, electronics industry, material coating technology, production of superconducting materials and even in medicine [7,8].…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical approaches on thermal and structural properties of Zn doped BSCCO glass ceramics

Koralay

Hicyilmaz

Çavdar

et al. 2016

Materials Science-Poland

Self Cite

View full text Add to dashboard Cite

Thermal properties of Cu-Zn partially substituted Bi 1.8 Sr 2 Ca 2 Cu 3.2−x Zn x O 10+δ (x = 0, 0.1 and 0.5) glass-ceramic systems have been investigated with the help of a differential thermal analyzer (DTA) by using Johnson-Mehl-Avrami-Kolmogorov (JMAK) approximation. Non-isothermal crystallization kinetics of the samples has been tested. The calculated values of activation energy of crystallization (E) and Avrami parameter (n) ranged between 306.1 and 338.3 kJ·mol −1 and 1.29 and 3.59, respectively. Crystallization kinetics was compared following the partial substitution, before and after Zn doping of the sample. In addition, by using a scanning electron microscope (SEM) and X-ray powder diffractometer (XRD), structural properties of Zn doped BSCCO glass-ceramic samples were determined. Surface morphology of the samples was studied by SEM measurements. Lattice parameters and volume of the samples were calculated from the XRD measurements.

show abstract

Effect of Vanadium Substitution on the Dielectric Properties of Glass Ceramic Bi-2212 Superconductor

Cited by 24 publications

References 34 publications

Characterization of Au/As₂Se₃ Multifunctional Tunneling Devices

Characterization of Au/As₂Se₃ Multifunctional Tunneling Devices

Dielectric properties of (Zn) x /CuTl-1223 nanoparticle-superconductor composites

Experimental and theoretical approaches on thermal and structural properties of Zn doped BSCCO glass ceramics

Contact Info

Product

Resources

About

Effect of Vanadium Substitution on the Dielectric Properties of Glass Ceramic Bi-2212 Superconductor

Cited by 24 publications

References 34 publications

Characterization of Au/As2Se3 Multifunctional Tunneling Devices

Characterization of Au/As2Se3 Multifunctional Tunneling Devices

Dielectric properties of (Zn) x /CuTl-1223 nanoparticle-superconductor composites

Experimental and theoretical approaches on thermal and structural properties of Zn doped BSCCO glass ceramics

Contact Info

Product

Resources

About

Characterization of Au/As₂Se₃ Multifunctional Tunneling Devices

Characterization of Au/As₂Se₃ Multifunctional Tunneling Devices