World Library  



Journal of Applied Physics Collection (168 Books)


 
  • Cover Image

Journal of Applied Physics : Accuracy analysis for the determinati...

By: Xiren Zhang, Bincheng Li, and Xianming Liu

Description: Computer simulations are carried out to investigate the sensitivity of simultaneous determination of three electronic transport properties (carrier lifetime, carrier diffusivity, and front surface recombination velocity) of silicon wafers by modulated free carrier absorption (MFCA) via a multiparameter fitting procedure. The relative accuracy of the transport parameter determination by laterally resolved MFCA (LR-MFCA), in which the amplitude and phase are m...

Read More
  • Cover Image

Journal of Applied Physics : Acoustic anisotropy in uniaxial tungs...

By: Jae-Hyeon Ko, S. G. Lushnikov, Do Han Kim, Seiji Kojima, Byeong-Eog Jun et al

Description: Acoustic properties were investigated for four tungsten bronze (TB) uniaxial ferroelectric crystals, i.e., (Sr0.61Ba0.39)5Nb10O30 (SBN61), Cu-doped (K0.5Na0.5)1.0(Sr0.75Ba0.25)4.5Nb10O30 (KNSBN:Cu), K5.80Li3.82Nb10.12O30, and K4.74Li3.07Nb10.44O30 of which the spontaneous polarization is directed along the polar c axis. Large acoustic anisotropy between the two elastic constants C11 and C33 have been observed from all samples. C33 exhibits a significant soft...

Read More
  • Cover Image

Journal of Applied Physics : Adhesion and interfacial fracture tou...

By: Nima Rahbar, Kurt Wolf, Argjenta Orana, Roy Fennimore, Zong Zong et al

Description: This paper presents the results of a combined experimental and theoretical study of adhesion between hard and soft layers that are relevant to medical devices such as drug-eluting stents and semiconductor applications. Brazil disk specimens were used to measure the interfacial fracture energies between model parylene C and 316L stainless steel over a wide range of mode mixities. The trends in the overall fracture energies are predicted using a combination of...

Read More
  • Cover Image

Journal of Applied Physics : Al-doped ZnO nanocrystals

By: Pratibha Kadam, Chitra Agashe, and Shailaja Mahamuni

Description: Al3+-doped ZnO nanocrystals were differently obtained by wet chemical and an electrochemical route. An increase in forbidden gap due to change in crystal size and also due to Al3+ doping in ZnO is critically analyzed. The Moss–Burstein type shift in Al3+-doped ZnO nanocrystals provides an evidence of successful Al3+ doping in ZnO nanocrystals. The possibility of varying the carrier concentration in ZnO nanocrystals is the indirect implication of the present investigations.

Read More
  • Cover Image

Journal of Applied Physics : Alternative to classic annealing trea...

By: O. Van Overschelde, G. Guisbiers, F. Hamadi, A. Hemberg, R. Snyders et al

Description: Titanium dioxide thin films have been deposited by reactive magnetron sputtering on glass and subsequently irradiated by UV radiation using a KrF excimer laser. The influence of the laser fluence (F) on the constitution and microstructure of the deposited films is studied for 0.05

Read More
  • Cover Image

Journal of Applied Physics : An atomistic-based correction of the ...

By: S. Rodríguez-Bolívar, F. M. Gómez-Campos, and J. E. Carceller

Description: In this work, we propose a correction to the effective mass approach (EMA) to be used in Si quantum dot simulations. This correction tries to connect the different ways of modeling quantum dots within tight binding (considering the actual positions of the atoms and using additional atoms to passivate the surfaces) with those within the EMA, adapting the size of the simulated quantum dots to take the difference into account. With this aim, we implemented a 6×...

Read More
  • Cover Image

Journal of Applied Physics : Analysis of the acoustoelectric behav...

By: Cinzia Caliendo

Description: Piezoelectric AlN films, 1.3–6.2 μm thick, have been grown on bare and metallized Al2O3(0001) substrates by reactive radio-frequency-sputtering technique at 180 °C. The films were uniform, stress-free, highly c-axis oriented normal to the surface, and extremely adhesive to the substrates. Surface acoustic wave (SAW) delay lines, showing harmonic modes with operating frequencies up to about 2.44 GHz, were obtained just using conventional optical lithography a...

Read More
  • Cover Image

Journal of Applied Physics : Bending flexibility, kinking, and buc...

By: M. Riaz, A. Fulati, L. L. Yang, O. Nur, M. Willander et al

Description: Nanomechanical tests of bending flexibility, kinking, and buckling failure characterization of vertically aligned single crystal ZnO nanorods/nanowires were performed quantitatively by nanoindentation technique. These nanostructures were grown by the vapor liquid solid (VLS) method, a relatively high temperature approach, and the aqueous chemical growth (ACG) method, a relatively low temperature approach on different substrates, including SiC and Si. The fir...

Read More
  • Cover Image

Journal of Applied Physics : Blue-green upconversion emission in Z...

By: E. de la Rosa, D. Solis, L. A. Díaz-Torres, P. Salas, C. Angeles-Chavez et al

Description: Strong blue-green cooperative upconversion emission was observed under infrared excitation in 70 nm average crystallite size ZrO2:Yb3+ nanocrystals prepared by sol-gel process. The structural characterization was performed by x-ray diffraction and high resolution transmission electron microscopy suggesting that crystalline phase of nanoparticles is controlled by active ion concentration. The cooperative absorption coefficient η ∼ 2.5×10−22 is four orders of ...

Read More
  • Cover Image

Journal of Applied Physics : Cathode effects in cylindrical Hall t...

By: E. M. Granstedt, Y. Raitses, and N. J. Fisch

Description: Stable operation of a cylindrical Hall thruster has been achieved using a hot wire cathode, which functions as a controllable electron emission source. It is shown that as the electron emission from the cathode increases with wire heating, the discharge current increases, the plasma plume angle reduces, and the ion energy distribution function shifts toward higher energies. The observed effect of cathode electron emission on thruster parameters extends and c...

Read More
  • Cover Image

Journal of Applied Physics : Chaotic characteristics of corona dis...

By: Xiangyu Tan, Qiaogen Zhang, Xiuhuan Wang, Fu Sun, Wei Zha et al

Description: A point-plane electrode system in atmospheric air is established to investigate the mechanism of the corona discharge. By using this system, the current pulses of the corona discharges under the 50 Hz ac voltage are measured using partial discharge (PD) measurement instrument and constitute the point-plane voltage-current (V-I) characteristic equation together with the voltage. Then, this paper constructs the nonlinear circuit model and differential equation...

Read More
  • Cover Image

Journal of Applied Physics : Characteristics of amorphous Ag0.1(Ge...

By: Ki-Ho Song, Sung-Won Kim, Jae-Hee Seo, and Hyun-Yong Lee

Description: An amorphous chalcogenide Ge2Sb2Te5 film is most commonly used for phase-change data storage, in which its small volume is switched between amorphous and crystalline states by local heating with short laser or current pulses. A speed of amorphous-to-crystalline phase transformation in Ge2Sb2Te5 and Ag0.1(Ge2Sb2Te5)0.9 films has been evaluated on a nanosecond time scale using a 658-nm laser beam. The focused laser beam with a diameter <10 μm was illuminated i...

Read More
  • Cover Image

Journal of Applied Physics : Characterization of a controlled plas...

By: A. Flacco, A. Guemnie-Tafo, R. Nuter, M. Veltcheva, D. Batani et al

Description: We present experimental and numerical results on the formation of a controlled plasma density gradient in front of a solid target irradiated with a subpicosecond, moderate intensity laser pulse. Interferometry with femtosecond probe is used to map the temporal evolution of the spatial density distribution of the generated plasma. Experimental results are found to be in good agreement with 1D1/2 hydrodynamic simulations. Moreover, these numerical simulations ...

Read More
  • Cover Image

Journal of Applied Physics : Characterization of dilute InPN layer...

By: T. D. Das, S. Dhar, and B. M. Arora

Description: We have grown dilute InPN layers by liquid phase epitaxy and characterized them using high resolution x-ray diffraction, optical absorption, low temperature photoluminescence, and Hall measurement techniques. Our results indicate that a maximum amount of 0.2% nitrogen has been incorporated in the material with a band gap lowering consistent with expectations. The crystalline quality of the material is found to improve upon nitrogen incorporation. Large incre...

Read More
  • Cover Image

Journal of Applied Physics : Charge dynamics in ionic polymer meta...

By: Maurizio Porfiri

Description: In this paper, we study the charge dynamics in ionic polymer metal composites (IPMCs) in response to a voltage difference applied across their electrodes. We use the Poisson–Nernst–Planck equations to model the time evolution of the electric potential and the concentration of mobile counterions. We present an analytical solution of the nonlinear initial-boundary value problem by using matched asymptotic expansions. We determine the charge and electric potent...

Read More
  • Cover Image

Journal of Applied Physics : CoCrPt-oxide based perpendicular reco...

By: S. N. Piramanayagam, K. Srinivasan, R. Sbiaa, Yan Dong, and R. H. Victora

Description: Writability of magnetic recording media with high anisotropy constant (Ku) is one of the major challenges encountered in extremely high density recording. A possible avenue to improve writability in perpendicular magnetic recording is to reduce the spacing between the writing head and the soft magnetic underlayer (SUL) or head-to-keeper spacing (HKS). A hybrid layer structure for reducing the HKS between the SUL and the writing head is investigated. The prop...

Read More
  • Cover Image

Journal of Applied Physics : Comparison of resonant-phonon-assiste...

By: H. Li, J. C. Cao, Z. Y. Tan, and S. L. Feng

Description: The authors compare resonant-phonon-assisted terahertz quantum-cascade lasers with different active region designs, i.e., one-well injector and three-well module, using an ensemble Monte Carlo method. Carrier transport under injection anticrossing, parasitic anticrossing, and collection anticrossing couplings are investigated for both structures. The results show that the main parasitic current channel is the resonance of the injector 1′ with the lower lasin...

Read More
  • Cover Image

Journal of Applied Physics : Comparison of sensitivities of carbon...

By: Masuhiro Abe, Katsuyuki Murata, Tatsuaki Ataka, and Kazuhiko Matsumoto

Description: The sensitivities of biosensors using top-gate-type carbon nanotube field-effect transistors (CNT-FETs) with and without a top metal gate were compared. The CNT-FET biosensor without the top metal gate (sensor I) showed about three times higher transconductance than the one with the top metal gate (sensor II) when they were modulated by a reference gate electrode placed in a solution. Further, the sensitivity of sensor I was three times higher than sensor II...

Read More
  • Cover Image

Journal of Applied Physics : Composition dependence of electronic ...

By: G. He, L. D. Zhang, G. W. Meng, G. H. Li, G. T. Fei et al.

Description: Composition-dependent electronic structure and optical properties of Hf1−xSixOy (0.1 ≤ x ≤ 0.6) gate dielectrics on Si at 450 °C grown by UV-photo-induced chemical vapor deposition (UV-CVD) have been investigated via x-ray photoemission spectroscopy and spectroscopy ellipsometry (SE). By means of the chemical shifts in the Hf 4f, Si 2p, and O 1s spectra, the Hf–O–Si bondings in the as-deposited films have been confirmed. Analyses of composition-dependent ban...

Read More
  • Cover Image

Journal of Applied Physics : Correlation of local structure and el...

By: Damiano Giubertoni, Giancarlo Pepponi, Salvatore Gennaro, Massimo Bersani, Mehmet Alper Sahiner et al

Description: The understanding of the behavior of arsenic in highly doped near surface silicon layers is of crucial importance for the formation of N-type ultrashallow junctions in current and future very large scale integrated technology. This is of particular relevance when studying recently developed implantation and annealing methods. Past theoretical as well as experimental investigations have suggested that the increase in As concentration, and therefore the recipr...

Read More
 
1
|
2
|
3
|
4
|
5
Records: 1 - 20 of 168 - Pages: 



Copyright © World Public Library. All rights reserved. eBooks from World Public Library are sponsored by the World Public Library Association,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.