AIP Advances
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The flexoelectric effect associated size dependent pyroelectricity in solid dielectricsA phenomenological thermodynamic theory is used to investigate the effect of strain gradient on the pyroelectric effect in centrosymmetric dielectric solids. Direct pyroelectricity can exist as external mechanical stress is applied to non-pyroelectric dielectrics with shapes such as truncated pyramids, due to elastic strain gradient induced flexoelectric polarization. Effective pyroelectri... ... hiện toàn bộ
AIP Advances - Tập 5 Số 9 - 2015
Channel flow of Ellis fluid due to peristalsisAn analysis is carried out to investigate the peristaltic pumping of a non-Newtonian Ellis fluid in a planar channel. The coupled nonlinear partial differential equations governing the problem are simplified under the widely used assumption of long wavelength and low Reynolds number. A semi- analytical approach is adopted to obtain the expressions for stream function, longitudinal velocity... ... hiện toàn bộ
AIP Advances - Tập 5 Số 9 - 2015
Adaptive neural network backstepping control for a class of uncertain fractional-order chaotic systems with unknown backlash-like hysteresisIn this paper, we consider the control problem of a class of uncertain fractional-order chaotic systems preceded by unknown backlash-like hysteresis nonlinearities based on backstepping control algorithm. We model the hysteresis by using a differential equation. Based on the fractional Lyapunov stability criterion and the backstepping algorithm procedures, an adaptive neural network contro... ... hiện toàn bộ
AIP Advances - Tập 6 Số 8 - 2016
Air transparent soundproof windowA soundproof window or wall which is transparent to airflow is presented. The design is based on two wave theories: the theory of diffraction and the theory of acoustic metamaterials. It consists of a three-dimensional array of strong diffraction-type resonators with many holes centered on each individual resonator. The negative effective bulk modulus of the resonators produces evanescent ... ... hiện toàn bộ
AIP Advances - Tập 4 Số 11 - 2014
Phase control and Young’s modulus of tungsten thin film prepared by dual ion beam sputtering depositionIn this letter, tungsten films of varying thickness from ∼20 nm to ∼80 nm were prepared at different deposition temperature by Dual ion beam sputtering deposition (DIBSD) method. The influence of thickness and deposition temperature on the films phase, microstructure and Young’s modulus was studied briefly. The experiments prove that a double-layer structure, formation takes place i.e. β p... ... hiện toàn bộ
AIP Advances - Tập 8 Số 3 - 2018
Magnetocaloric effect of Sr-substituted BaFeO3 in the liquid nitrogen and natural gas temperature regionsWe have investigated the magnetocaloric effect (MCE) of Ba1-xSrxFe4+O3 (x≤0.2), a series of cubic perovskites showing a field-induced transition from helical antiferromagnetism to ferromagnetism. The maximum magnetic entropy change (-ΔSmax) at 50 kOe varies from ∼5.8 J kg-1K-1 (x=0) to ∼4.9 J kg-1K-1 (x=0.2), while the refrigerant capacity remains almost the same at ∼165 J kg-1. Interestin... ... hiện toàn bộ
AIP Advances - Tập 7 Số 4 - 2017
Studies on structural, thermal and AC conductivity scaling of PEO-LiPF6 polymer electrolyte with added ionic liquid [BMIMPF6]Preparation and characterization of polymer electrolyte films of PEO+10wt.% LiPF6 + xwt.% BMIMPF6 (1-butyl-3-methylimidazolium hexafluorophosphate) containing dopant salt lithium hexafluorophosphate (LiPF6) and ionic liquid (BMIMPF6) having common anion PF6- are reported. The ionic conductivity of the polymer electrolyte films has been found to increase with increasing concentration of BMI... ... hiện toàn bộ
AIP Advances - Tập 5 Số 7 - 2015
Darcy-Forchheimer flow of Maxwell nanofluid flow with nonlinear thermal radiation and activation energyThe present article is about the study of Darcy-Forchheimer flow of Maxwell nanofluid over a linear stretching surface. Effects like variable thermal conductivity, activation energy, nonlinear thermal radiation is also incorporated for the analysis of heat and mass transfer. The governing nonlinear partial differential equations (PDEs) with convective boundary conditions are first converte... ... hiện toàn bộ
AIP Advances - Tập 8 Số 3 - 2018
Optical bistability based on Bragg grating resonators in metal-insulator-metal plasmonic waveguidesAn optically bistable device based on a Bragg grating resonator with a nonlinear medium in metal-insulator-metal waveguides is proposed. Its properties are numerically investigated by a finite-difference time-domain method and further qualitatively analyzed by adopting Airy equation. Cavities with different Q factors are compared with respect to bi-stability. Cavities with a small Q factor... ... hiện toàn bộ
AIP Advances - Tập 3 Số 1 - 2013
Effect of ionic substitutions on the magnetic properties of strontium hexaferrite: A first principles studyWe investigated the effect of substitution of various ions at the Fe sites on magnetic properties of strontium hexaferrite (SrFe12O19) using first principles method based on density functional theory. The site occupancies of substituted atoms were estimated by calculating the substitution energies of different configurations. The formation probabilities of configurations were used to calcu... ... hiện toàn bộ
AIP Advances - Tập 7 Số 11 - 2017
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