The Moldavian Journal of the Physical Sciences最新文献_第2页

Atypical topological features of the Bi1-xSbx(0 ≤ x ≤ 0.2) nano-width bicrystaline boundaries Bi1-xSbx(0≤x≤0.2)纳米宽双晶边界的非典型拓扑特征

The Moldavian Journal of the Physical Sciences Pub Date : 2022-01-01 DOI: 10.53081/mjps.2021.20-2.02

F. Muntyanu, V. Chistol, E. Condrea

引用次数: 0

Transient photocurrent behavior in amorphous thin film heterostructures 非晶薄膜异质结构中的瞬态光电流行为

The Moldavian Journal of the Physical Sciences Pub Date : 2022-01-01 DOI: 10.53081/mjps.2021.20-2.07

O. Iaseniuc

引用次数: 0

Birefringence, isotropic points, and optical filters based on CuGaxAl1-xSe(S)2 crystals 基于CuGaxAl1-xSe(S)2晶体的双折射、各向同性点和光学滤波器

The Moldavian Journal of the Physical Sciences Pub Date : 2022-01-01 DOI: 10.53081/mjps.2021.20-2.04

Alisa Maşnic, V. Ursaki

引用次数: 0

Various manifestations of weak magnetism and superconductivity in inclination interfaces of Bi, Sb and Bi1-xSbx Bi、Sb和Bi1-xSbx倾斜界面弱磁性和超导性的各种表现

The Moldavian Journal of the Physical Sciences Pub Date : 2022-01-01 DOI: 10.53081/mjps.2021.20-2.03

F. Muntyanu, K. Nenkov, Andrzej J. Zalesk, E. Condrea, V. Chistol

{"title":"Various manifestations of weak magnetism and superconductivity in inclination interfaces of Bi, Sb and Bi1-xSbx","authors":"F. Muntyanu, K. Nenkov, Andrzej J. Zalesk, E. Condrea, V. Chistol","doi":"10.53081/mjps.2021.20-2.03","DOIUrl":"https://doi.org/10.53081/mjps.2021.20-2.03","url":null,"abstract":"The magnetic properties of the nano-width bicrystal interfaces (CIs) of Bi, Sb and 3D topological insulator Bi1xSbx (0.06 ≤ x ≤ 0.2) are studied in a temperature range of 1.6–300 K. These materials do not show superconductivity under normal rhombohedral conditions and are anomalous diamagnetics. At the same time, two superconducting phases with Tc ≤ 21 K and magnetic hysteresis loops against a diamagnetic background typical for strong type II superconductors are identified in Bi interfaces. At the CIs of Bi1xSbx (0.06 ≤ x ≤ 0.2), as well as Sb, a superconducting transition and a ferromagnetic hysteresis loop or a dual loop (superimposed ferromagnetic and superconducting loops) against a paramagnetic background are observed; they indicate the simultaneous occurrence of superconductivity and weak ferromagnetism, which is specific to 3D topological insulators. The revealed coexistence of superconductivity and weak magnetism at these CIs is of significant interest for the fundamental physics and future applications in quantum computing and spintronic devices.","PeriodicalId":291924,"journal":{"name":"The Moldavian Journal of the Physical Sciences","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125189449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Invariant sample-and-hold amplifier to the hold capacitor discharge 不变采样保持放大器对保持电容放电

The Moldavian Journal of the Physical Sciences Pub Date : 2022-01-01 DOI: 10.53081/mjps.2021.20-2.08

A. Penin, A. Sidorenko

{"title":"Invariant sample-and-hold amplifier to the hold capacitor discharge","authors":"A. Penin, A. Sidorenko","doi":"10.53081/mjps.2021.20-2.08","DOIUrl":"https://doi.org/10.53081/mjps.2021.20-2.08","url":null,"abstract":"The conventional measurement signal sample-and-hold amplifier comprising a sample and hold circuit in the form of a sample switch, a voltage hold capacitor, and a voltage repeater further includes two similar sample-and-hold circuits of reference voltages. The idea of the proposed amplifier is that hold capacitors are equally discharged in all three sample-and-hold circuits. Therefore, an affine ratio for the stored three voltage samples does not change the intrinsic value over a long discharge time. Then, this invariant affine ratio is taken as the measuring signal. A reproducing (recovery) unit, which is also included, calculates this affine ratio. In turn, the included information signal former shaper pre-converts (prepares) the initial measurement signal using reference voltages. Thus, the hold time is significantly increased, while maintaining a short sample time for the given hold capacitor. On the other hand, the affine ratio uses differences and voltage ratios. Therefore, offset errors are mutually reduced. It is possible to implement the proposed sample-and-hold amplifier in the form of an analog chip based on a multiplier and the known multi-channel sample-and-hold amplifier.","PeriodicalId":291924,"journal":{"name":"The Moldavian Journal of the Physical Sciences","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134258750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of fuzzy system management for solar panel motion using an arduino microcontroller 基于arduino单片机的太阳能帆板运动模糊管理系统的开发

The Moldavian Journal of the Physical Sciences Pub Date : 2022-01-01 DOI: 10.53081/mjps.2021.20-2.09

V. Cojocaru, L. Ghimpu, T. Fedorisin, R. Galus, Victor Suman

引用次数: 0

Effect of aging, temperature, and ambient gases on the complex impedance of As2Te13Ge8S3 glassy films 老化、温度和环境气体对As2Te13Ge8S3玻璃膜复合阻抗的影响

The Moldavian Journal of the Physical Sciences Pub Date : 2022-01-01 DOI: 10.53081/mjps.2021.20-2.06

M. Ciobanu, D. Tsiulyanu

{"title":"Effect of aging, temperature, and ambient gases on the complex impedance of As2Te13Ge8S3 glassy films","authors":"M. Ciobanu, D. Tsiulyanu","doi":"10.53081/mjps.2021.20-2.06","DOIUrl":"https://doi.org/10.53081/mjps.2021.20-2.06","url":null,"abstract":"The work is focused on the application of the impedance spectroscopy method to provide evidence and study the effects of aging, temperature, and gas adsorption in chalcogenide-based thin films. The experiments are carried out with thin films of glassy quaternary composition As2Te13Ge8S3 in a wide frequency range at different temperatures under different environmental conditions, in particular, either dry or wet air or their mixtures with NO2 or CO2. It is found that aging has a significant effect on the impedance spectra of Pt–As2Te13Ge8S3–Pt functional structures, which make evidence for the presence of substantial spatial and compositional disordering. This effect can be stabilized by the post-preparation annealing of the sample. The effect of temperature on impedance spectra consists in a variation in the both real and imaginary parts of impedance that appear to be extremely sensitive to adsorptive processes. Adsorption of nitrogen dioxide results in a significant frequency-dependent decrease in the impedance parameters, which is attributed to an effective “strong” chemisorption process due to the interaction of \"odd\" electrons of NO2 molecules with lone pair electrons of chalcogen atoms. The effect of water vapors leads only to an increase in the real part of impedance, while the imaginary part abruptly decreases; this fact is attributed to a “weak” form of chemisorption. The effect of carbon dioxide on the impedance spectra is attributed to the physical adsorption of CO2 molecules. This effect is weak; however, it is reversible and clearly observed even at room temperature.","PeriodicalId":291924,"journal":{"name":"The Moldavian Journal of the Physical Sciences","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130092831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MODELING OF A NANOCYLINDER 纳米圆柱体的建模

The Moldavian Journal of the Physical Sciences Pub Date : 2021-07-01 DOI: 10.53081/MJPS.2021.20-1.03

S. Baranov

引用次数: 0

COORDINATION COMPLEX [Eu(μ 2 -OC 2 H 5 )(btfa)(NO 3 ) (phen)] 2 ·phen WITH HIGH LUMINESCENT EFFICIENCY 配合物[Eu(μ 2 -OC 2h5)(btfa)(no3)(phen)] 2·phen，发光效率高

The Moldavian Journal of the Physical Sciences Pub Date : 2021-07-01 DOI: 10.53081/MJPS.2021.20-1.06

M. Iovu, V. Verlan, I. Culeac, O. Bordian, V. Zubareva, I. Bulhac, M. Enăchescu, N. Siminel, A. Siminel

引用次数: 1

FABRICATION OF p-NiO/n-ZnO:Ga HETEROSTRUCTURES FOR A RECTIFIER DIODE AND A UV PHOTODETECTOR VIA RF MAGNETRON SPUTTERING AND SPRAY PYROLYSIS SYNTHESIS 用射频磁控溅射和喷雾热解合成制备用于整流二极管和紫外光电探测器的p-NiO/n-ZnO:Ga异质结构

The Moldavian Journal of the Physical Sciences Pub Date : 2021-07-01 DOI: 10.53081/MJPS.2021.20-1.05

L. Ghimpu, Victor Suman, D. Rusnac, T. Potlog

{"title":"FABRICATION OF p-NiO/n-ZnO:Ga HETEROSTRUCTURES FOR A RECTIFIER DIODE AND A UV PHOTODETECTOR VIA RF MAGNETRON SPUTTERING AND SPRAY PYROLYSIS SYNTHESIS","authors":"L. Ghimpu, Victor Suman, D. Rusnac, T. Potlog","doi":"10.53081/MJPS.2021.20-1.05","DOIUrl":"https://doi.org/10.53081/MJPS.2021.20-1.05","url":null,"abstract":"In this paper, a p–n thin film NiO/ZnO heterojunction for a rectifier diode and a UV photodetector is prepared and characterized. Nickel oxide (NiO) and gallium-doped zinc oxide (ZnO:Ga) thin films are grown by RF magnetron sputtering and spray pyrolysis techniques, respectively. The crystal structure of the thin films is studied by the X-ray diffraction (XRD) method. The transmittance and reflectance are studied by UV–VIS spectroscopy. The p–n electrical parameters are estimated from current–voltage characteristics. The effects of duration of thermal annealing at 450 o C on the characteristics of the NiO/ZnO:Ga device are evaluated. The non-annealed diode shows the best rectification coefficient of 10 5 at ±1 V. The p–n photodetection capability is studied under UV illumination. At a reverse bias of –3 V under 365-nm UV illumination, the device shows a current intensity of ~6.2 × 10 12 A. The observed increase in the reverse current intensity by about two orders of magnitude under a UV lamp with a spectral irradiance of 10 W m 2 m 1 indicates a promising application in UV light detection.","PeriodicalId":291924,"journal":{"name":"The Moldavian Journal of the Physical Sciences","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129100517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0