Influences of the dislocation density on the electric behavior of n-CdTe

Brihi, N.; Lmai, F.; Takkouk, Z.; Ayad, F.; Ayoub, M.; Hage‐Ali, M.

doi:10.1016/j.mseb.2006.10.003

Cited by 16 publications

(8 citation statements)

References 13 publications

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“…The n 2 values show an inverse evolution with the gap band with Ca doping for the Ti 1-x Ca 2x O 2 (0 x 0,5) compounds according to equation (28). Thus, the values have been reported in table 4 as well.…”

Section: Non-linear Optical Parametersmentioning

confidence: 80%

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Enhancement of structural, linear and non-linear optical properties of Ti_1−xCa_2xO₂ solid solutions

Ezairi¹,

Elouafi²,

Lmai³

et al. 2022

Phys. Scr.

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Structural and morphological analyses of the Ti1-xCa2xO2 solid solutions and their complete linear and non-linear optical properties were investigated. Ti1-xCa2xO2 (0≤x≤0.5) powders were successfully synthesized via solid-state reaction route. The XRD patterns confirmed that the pure and doped samples exhibited anatase TiO2 phase. The crystallite size of TiO2 decreased to 82 nm after Ca doping. Furthermore, the dislocation density and lattice deformation are increased with increasing calcium concentration. SEM analysis revealed that Ti1-xCa2xO2 (0≤x≤0.5) powders have a granular structure and with doping, atom aggregations take on softer shapes. Energy dispersive x-ray Analysis (EDX) showed the appropriate composition for the ions depicted in the structure. Using spectrophotometric data, linear and nonlinear optical parameters were obtained and associated with the Ca content. The band gap of TiO2 has shifted from 3.1 to 2.8 eV with dopant concentration. As the percentage of Ca increased, the dielectric constant and optical conductivity also increased. The dispersion energy, plasma frequency, non-linear refractive index and Sellmeier’s parameters were also calculated and discussed with respect to Ca doping. The optical results obtained revealed the potential of the

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Section: Non-linear Optical Parametersmentioning

confidence: 80%

“…In order to understand the effect of defects on the structure of Ti 1-x Ca 2x O 2 (0 x 0.5), we can define the density of dislocations (δ) as the length of the lines of dislocations per unit area (lines/m 2 ). The dislocation density (d) of the powders is defined as [27,28]:…”

Section: Kmentioning

confidence: 99%

Enhancement of structural, linear and non-linear optical properties of Ti_1−xCa_2xO₂ solid solutions

Ezairi¹,

Elouafi²,

Lmai³

et al. 2022

Phys. Scr.

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“…Magnetic refrigeration based on the magnetocaloric effect (MCE) is a promising alternative compared to the conventional gas compression-expansion technique [1][2][3][4][5][6][7][8]. The magnetocaloric effect of materials has been widely investigated experimentally and theoretically in order to better understand the fundamental physical properties of these materials [9][10][11][12][13][14][15][16][17][18]. According to the literature, materials with a high capacity for refrigerating (RCP) at low temperatures are preferred, particularly in spatial sciences, industrial refrigeration, and the liquefaction industry [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

et al. 2023

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The structural, morphological, magnetic and magnetocaloric properties of Er2Ir2O7 are investigated. The X-ray diffraction analysis showed that Er2Ir2O7 has a cubic structure with the Fđ3m space group. Using Williamson-Hall (W-H) plot, the crystallite size was found to be smaller than that obtained from the SEM image. Magnetic measurements revealed a weak ferromagnetic transition at TC =140K, caused by the appearance of magnetic order of the Ir moments. ΔT (temperature at full width of half maxima) was estimated to be 27K and 40K for magnetic field changes of 40 kOe and 50 kOe, corresponding to the relative cooling power (RCP) values of 98 J/kg and 128 J/kg, respectively. Temperature-averaged Entropy Change (TEC) was calculated for all applied magnetic fields, and found to be slightly lower than (-∆S_M^max) values, indicating less hysteresis loss in the compound Er2Ir2O7 during the magnetic transition. This study provides a new pyrochlore material for MCE magnetocaloric applications.

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“…The substantial plastic strain was retained in the nanoindented ZnO nanobelts in the form of dislocations and misorientations, which could significantly alter a wide range of properties of the nanobelt. [13][14][15][16][17][18] Next we explored the association between the plastic deformation damage in the nanobelts and the resultant electrical signal changes. Figure 3a is a schematically sketched setup for the nanoindentation test on a ZnO nanobelt on a SiO 2 substrate.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Electrical Self-Healing of Mechanically Damaged Zinc Oxide Nanobelts

Zang

Webb

et al. 2010

Nano Lett.

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We report the observation of remarkable electrical self-healing in mechanically damaged ZnO nanobelts. Nanoindentation into intrinsically defect-free ZnO nanobelts induces deformation and crack damage, causing a dramatic electrical signal decrease. Two self-healing regimes in the nanoindented ZnO nanobelts are revealed. The physical mechanism for the observed phenomena is analyzed in terms of the nanoindentation-induced dislocations, the short-range atomic diffusion in nanostructures, and the local heating of the dislocation zone in the electrical measurement.

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Influences of the dislocation density on the electric behavior of n-CdTe

Cited by 16 publications

References 13 publications

Enhancement of structural, linear and non-linear optical properties of Ti_1−xCa_2xO₂ solid solutions

Enhancement of structural, linear and non-linear optical properties of Ti_1−xCa_2xO₂ solid solutions

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇

Electrical Self-Healing of Mechanically Damaged Zinc Oxide Nanobelts

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Influences of the dislocation density on the electric behavior of n-CdTe

Cited by 16 publications

References 13 publications

Enhancement of structural, linear and non-linear optical properties of Ti1−xCa2xO2 solid solutions

Enhancement of structural, linear and non-linear optical properties of Ti1−xCa2xO2 solid solutions

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er2Ir2O7

Electrical Self-Healing of Mechanically Damaged Zinc Oxide Nanobelts

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Product

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Enhancement of structural, linear and non-linear optical properties of Ti_1−xCa_2xO₂ solid solutions

Enhancement of structural, linear and non-linear optical properties of Ti_1−xCa_2xO₂ solid solutions

Structural, magnetic and magnetocaloric effect of pyrochlore iridate Er₂Ir₂O₇