On the dielectric study and AC conductivity measurements of Sb additive Se–Te chalcogenide alloys

Sharma, Neha; Patial, Balbir Singh; Thakur, Nagesh

doi:10.1007/s00339-016-9728-0

Cited by 19 publications

(4 citation statements)

References 14 publications

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“…Furthermore, the β-absorption peak of PVDF appeared at 837.2 cm −1 , which confirms the effect of electrospinning on enhancing the polarizability of PVDF. The amount of β-phase was quantitatively calculated by considering the relative absorption intensity of the β-phase (840 cm −1 ) and the α phase (760 cm −1 ), according to the proposed Gregorio and Cestari equation [33]:…”

Section: Physical Characterizationsmentioning

confidence: 99%

Acoustic Energy Harvesting and Sensing via Electrospun PVDF Nanofiber Membrane

Shehata

Hassanin

Elnabawy

et al. 2020

Sensors

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This paper introduces a new usage of piezoelectric poly (vinylidene fluoride) (PVDF) electrospun nanofiber (NF) membrane as a sensing unit for acoustic signals. In this work, an NF mat has been used as a transducer to convert acoustic signals into electric voltage outcomes. The detected voltage has been analyzed as a function of both frequency and amplitude of the excitation acoustic signal. Additionally, the detected AC signal can be retraced as a function of both frequency and amplitude with some wave distortion at relatively higher amplitudes and within a certain acoustic spectrum region. Meanwhile, the NFs have been characterized through piezoelectric responses, beta sheet calculations and surface morphology. This work is promising as a low-cost and innovative solution to harvest acoustic signals coming from wide resources of sound and noise.

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Section: Physical Characterizationsmentioning

confidence: 99%

Acoustic Energy Harvesting and Sensing via Electrospun PVDF Nanofiber Membrane

Shehata

Hassanin

Elnabawy

et al. 2020

Sensors

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“…The values of dielectric constant are calculated by using the relation [24] ɛʹ = Cd ɛₒA (12) where C is the capacitance of the material, d is the thickness of the pellet, ɛₒ is the permittivity of the free space and A is the area of the pellet of the investigation sample. The variation of dielectric constant with frequency is shown in Fig.…”

Section: Frequency and Temperature Dependence Of Dielectric Constantmentioning

confidence: 99%

“…The polarization plays an important role in the explanation of decrease in dielectric constant with frequency. Various types of polarizations such as ionic, electronic, orientational and space charge polarization are responsible for such dielectric behavior [24]. Electronic polarization (10 13 -10 15 Hz) occurs due to displacement of valence electrons relative to positive nucleus.…”

Section: Frequency and Temperature Dependence Of Dielectric Constantmentioning

confidence: 99%

AC CONDUCTIVITY AND DIELECTRIC PROPERTIES OF AMORPHOUS Se69Sn10Ge21-xSbx (6≤ x ≤14) GLASSY SYSTEM

CHAUDHARY¹,

MODGIL²,

RANGRA³

2020

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The glassy network system under investigation is prepared by using melt quench technique. The ac conductivity and dielectric behavior studied in ac frequency range (500Hz–1MHz) below glass transformation region. The correlated barrier hopping (CBH) model is used for interpreting the relation between the frequency exponent and temperature. The equation based on the Guintini model gives the value of maximum barrier height from the dielectric measurements. The compositional variation of conduction mechanism and dielectric parameters is studied to explore material’s nature.

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“…Zn is chosen as a dopant to Se-Te due to its high electropositive property and intermediate atomic radius as compared to other dopants such as (Sb, Ge, In, Ag) [16][17][18]. Zn may work as a modifier because of the electronegativities and atomic radii differences between the elements (Se, Te, Zn).…”

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confidence: 99%

Estimation of The Electrical and Dielectric Properties For Se98Te2 and Se96Te2X2 (X = Zn and Cd) Amorphous Films.

Shakra

Fadel

Kalila³

2021

Preprint

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Bulk glassy Se98Te2 and Se96Te2X2 (X = Zn and Cd) were prepared by melting quenching method. Thin films of various thicknesses (200 – 670 nm) were obtained by the thermal evaporation method. The structure of the prepared compositions was investigated by X-ray and EDX analysis. We studied the effect of Zn and Cd addition on the electric and dielectric properties of Se98Te2 thin films. Our measurements were studied in the temperature range (298-323K) below the glass transition temperature and frequency range (100 Hz-1 MHz). DC conductivity showed a single conduction mechanism by hopping of charge carriers at the band edges for the studied system. The dependence of Ac conductivity on frequency is linear with frequency exponent s lies very close to unit and is independent of temperature. This can be explained by the correlated barrier hopping (CBH) model. The dielectric constant ε1 and dielectric loss ε2 noticed to decrease with frequency and increase with temperature. The maximum barrier height Wm was calculated according to Guinitin.

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On the dielectric study and AC conductivity measurements of Sb additive Se–Te chalcogenide alloys

Cited by 19 publications

References 14 publications

Acoustic Energy Harvesting and Sensing via Electrospun PVDF Nanofiber Membrane

Acoustic Energy Harvesting and Sensing via Electrospun PVDF Nanofiber Membrane

AC CONDUCTIVITY AND DIELECTRIC PROPERTIES OF AMORPHOUS Se69Sn10Ge21-xSbx (6≤ x ≤14) GLASSY SYSTEM

Estimation of The Electrical and Dielectric Properties For Se98Te2 and Se96Te2X2 (X = Zn and Cd) Amorphous Films.

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