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Effect of K Substitutions on Structural and Superconducting Properties in Bi1.6Pb0.4Sr2-xKxCa2Cu3O10+ Compounds
VNU Journal of Science: Mathematics - Physics - Tập 35 Số 2 - 2019
Tran Hai Duc
Abstract: Effect of K substitutions on structural and superconducting properties in Bi-Pb-Sr-Ca-Cu-O (BPSCCO) system has been investigated. Bulk Bi1.6Pb0.4Sr2-xKxCa2Cu3O10+d (where x = 0.00; 0.04; 0.08 and 0.1) samples were fabricated by using the solid-state reaction method. Structural properties of the samples were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energ... hiện toàn bộ
Characterization of ZnO:Al deposited by co-sputtering for transparent conductive electrodes
Communications in Physics - Tập 25 Số 4 - 2016
Bui Van Diep, Than Thi Cuc, Hoang Ngoc Lam Huong, Hoang Chi Hieu, Nguyen Minh Hieu, Bui Bao Thoa, Nguyen Tran Thuat
Aluminum doped zinc oxide was prepared by magnetron sputtering methods at room temperature using a ZnO ceramic target doped 2%wt by Al2O3. The optical transmittance of the films is higher than 80% in the visible range. A direct bandgap type was reached by controlling deposition conditions; the bandgap value was in the range between 3.2 eV and 4.2 eV. Good electrical and optical properties were obt... hiện toàn bộ
#AZO thin film #co-sputtering method #resistivity #transmittance
No Small Hairs in Anisotropic Power-law Gauss-Bonnet Inflation
Communications in Physics - Tập 29 Số 2 - 2019
Tuan Quoc Do
We will examine whether anisotropic hairs exist in a string-inspired scalar-Gauss-Bonnet gravity model with the absence of potential of scalar field during the inflationary phase. As a result, we are able to obtain the Bianchi type I power-law solution to this model under the assumption that the scalar field acts as the phantom field, whose kinetic is negative definite. However, the obtained aniso... hiện toàn bộ
#Gauss-Bonnet gravity #Inflation #Bianchi type I metric #Cosmic no-hair conjecture
Excitation Function for the Production of \(^{96}\)Nb in the \(^{nat}\)Zr(\(p,x\)) Reaction
Communications in Physics - Tập 31 Số 2 - Trang 179 - 2021
Bui Van Loat, Kim Tien Thanh, Guinyun Kim, Pham Duc Khue, Nguyen Thanh Luan, Nguyen Thi Hien, Nguyen Van Do
We have measured the excitation function for the production of 96Nb in proton induced reaction on natural zirconium in the energy range of 10.58 MeV to 43.61 MeV. The measurement was performed using a stacked-foil activation method combined with off-line γ-ray spectrometry. The stack containing Zr samples, Cu monitors, and several energy degraders was irradiated at the MC-50 Cyclotron of the Korea... hiện toàn bộ
#natZr(p #x)96Nb reaction #Excitation function #Stacked-foil activation method #γ-ray spectroscopy #TALYS-1.95 #TENDL-2019 data library.
Monte Carlo investigation for an Ising model with competitive magnetic interactions in the dominant ferromagnetic-interaction regime
Communications in Physics - Tập 33 Số 2 - 2023
Phong H. Nguyen, Giang H. Bach, Niem T. Nguyen, Cong T. Bach , Oanh K. T. Nguyen, Huy D. Nguyen
We apply classical Monte Carlo simulation to examine the thermodynamic properties of perovskites described by the Ising model with competitive magnetic interactions. By correspondingly adjusting the ferromagnetic-interaction and antiferromagnetic-interaction probabilities, \(p\) and \((1-p)\), in the regime \(p \ge 0.5\), the temperature dependence of magnetization, total energy, spin susceptibili... hiện toàn bộ
#Ising model #Monte Carlo simulation #phase separation #magnetic interactions
Hyperon \(\Omega\) Production in \(pp\) Collisions at Energy 8 TeV
Communications in Physics - Tập 27 Số 1 - 2017
Nguyen Mau Chung, Nguyen Thị Dung, Tran Minh Tam
Because strange quark produced copiously in pp collisions, strange hyperon production is one of the ideal tools to investigate the hadronization process and baryon transport theory. We are especially interested in the hyperon Ω production because this baryon contents only strange quark. Our new studies of the pure strange hyperon Ω produced in pp collision at s = 8 TeV are shown in this report. Th... hiện toàn bộ
Influence of Spin Fluctuation on the Magnetic Properties of EuO Ultra-thin Film
Communications in Physics - Tập 23 Số 3 - 2013
Bach Thanh Cong, Pham Huong Thao
The Gaussian spin fluctuation theory is applied to study magnetic properties (Curie temperature, magnetization) of EuO  ultra-thin films within nearest neighbor and next nearest neighbor exchange approximation. The dependence of Curie temperature on the thickness of the free EuO ultrathin film is calculated and compared with the results of the other mean field method- constant coupling approximati... hiện toàn bộ
#exchange interaction #magnetic properties #ultra-thin films
Evaluation of Simultaneous Fitting Method for \(\beta\)-Decay Half-Lives and \(\beta\)-Delayed Multi Neutron Emission Probabilities Developed for the Briken Experiment
Communications in Physics - Tập 28 Số 4 - 2018
Le Hong Khiem, Vi Ho Phong, Shunji Nishimura
This paper presents a Monte-Carlo code to simulate the time sequences of the \(\beta\)-decay following implantation of a continuous radioactive ion beam in to a segmented silicon detector. We extended our simulation to the \(\beta\)-delayed neutron process. Ananalis is procedure, which has been developed to obtain simultaneously the \(\beta\)-decay half-life and the \(\beta\)-delayed multi-neutron... hiện toàn bộ
#analysis methodology #beta-delayed neutrons #Monte-Carlo simulation
Fabrication and Characterization of Single-segmented CoNiP and Multi-segment CoNiP/Au Nanowires
Communications in Physics - Tập 24 Số 3 - 2014
Le Tuan Tu, Luu Van Thiem
This paper represents the fabrication of CoNiP single segment and CoNiP/Au multisegment nanowires. We have fabricated these nanowires by electrodeposition method into polycarbonate templates with a nominal pore diameter about 100 nm. The hystersis loops were measured with the applied magnetic field parallel and perpendicular to the wire axis using a vibrating sample magnetometry (VSM). The structu... hiện toàn bộ
Optical Properties of Zn-based Semiconductor Nanoparticles and Application in Two-barcode Encryption
VNU Journal of Science: Mathematics - Physics - Tập 31 Số 4 - 2015
Luu Manh Quynh, Hoang Van Huy, Nguyen Hoang Nam
Mn-doped ZnS (ZnS/Mn) nanoparticles synthesized by sono-chemical co-precipitation are combined with ZnO nanoparticles synthesized by sol-gel method for application in two-barcode encryption. Nanoparticles are mixed together in different mass proportions of ZnO: ZnS/Mn respectively being 5: 1, 10: 1, 15: 1, 20: 1, 25: 1.30 : 1 and 35: 1, before being pressed in 1 cm diameter, 1 mm thick KBr pellets... hiện toàn bộ
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