Acta Physica Polonica A最新文献_第10页

Role of Multi-Walled Carbon Nanotube Addition in Superconducting Properties of Bi2Sr2CaCu2O8+s Glass-Ceramic Superconductors 多壁碳纳米管加入对Bi2Sr2CaCu2O8+s玻璃陶瓷超导体超导性能的影响

IF 0.7 4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-04-01 DOI: 10.12693/aphyspola.143.298

K. Yakinci, Ö. Çiçek

{"title":"Role of Multi-Walled Carbon Nanotube Addition in Superconducting Properties of Bi2Sr2CaCu2O8+s Glass-Ceramic Superconductors","authors":"K. Yakinci, Ö. Çiçek","doi":"10.12693/aphyspola.143.298","DOIUrl":"https://doi.org/10.12693/aphyspola.143.298","url":null,"abstract":"In this work, pure and with 1, 3, 5, 10, and 15 wt% multi-walled carbon nanotube addition Bi 2 Sr 2 CaCu 2 O 8+ s glass–ceramic materials have been investigated in terms of thermal, structural, microstructural, electrical, and magnetic properties. Multi-walled carbon nanotubes with a purity of 96% were used to enhance electrical transport properties. Thermal properties have been examined using diﬀerential thermal analysis. According to the diﬀerential thermal analysis, the multi-walled carbon nanotube addition reduced the melting temperature and slightly increased the crystallization activation energy of the BiSrCaCuO material. X-ray analyses showed that all samples have tetragonal symmetry and did not change with addition, but a small change in the c -axis is observed. Scanning electron microscope analyses showed no signiﬁcant morphological change. The eﬀect of the additive on the resistivity measurements was found to be limited, and zero resistance temperature increased up to a level of 5 wt% addition and then decreased drastically for higher addition cases. The hole concentration of the samples was calculated, and it was found that there was a shift towards the over-doped region with the addition. For the transport critical current density measurements, the highest increase of about 30 % was obtained for the sample with 5 wt% multi-walled carbon nanotube addition, but in high addition cases, signiﬁcant losses were obtained. A similar situation occurred in magnetization versus magnetic ﬁeld measurements, and the highest magnetization critical current density value obtained ˚was 4 . 1 × 10 6 A/cm 2 at 4.2 K in the 5 wt% multi-wall","PeriodicalId":7164,"journal":{"name":"Acta Physica Polonica A","volume":"57 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77120905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Parameter Configuration on Free Vibration of Networked Harmonic Oscillators with Viscous Damping 参数配置对具有粘性阻尼的网络谐振子自由振动的影响

IF 0.7 4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-04-01 DOI: 10.12693/aphyspola.143.326

Xiangdong Liu

{"title":"Effect of Parameter Configuration on Free Vibration of Networked Harmonic Oscillators with Viscous Damping","authors":"Xiangdong Liu","doi":"10.12693/aphyspola.143.326","DOIUrl":"https://doi.org/10.12693/aphyspola.143.326","url":null,"abstract":"Heterogeneous oscillator networks consist of a dynamical function that describes the state of the oscillator (containing several parameters) and a topology that reﬂects the connections between the oscillators. Revealing the macroscopic dynamics of systems under diﬀerent conﬁgurations of parameters and topology is a topic worthy of discussion and comes with great challenges. In this study, we discuss the eﬀect of diﬀerent parameter conﬁgurations on the damped free vibration of a classical spring oscillator network. On the regular network, we give the analytical expression satisﬁed by the free vibration of the system under over-damping and critical damping. Furthermore, we discuss the fastest and slowest exponential rates of decay of the system for diﬀerent parameter conditions. In conjunction with quadratic eigenvalue theory, we extend the above analysis from regular networks to complex networks. We give a general method for calculating the eigenvalue spectrum of the system for arbitrary parameter conﬁgurations. In conjunction with the stability of the system and the rate of decay of the exponential rate, we also give numerical simulation results for the second largest and smallest real parts of the eigenvalues of the system. Finally, through the comparative analysis of the simulation results, we relax the matching relationship between the three parameters (mass, damping, and degree) to the matching between two parameters (mass and damping).","PeriodicalId":7164,"journal":{"name":"Acta Physica Polonica A","volume":"86 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85827959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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 Spark-Discharge System for Deposition of Metal Oxide Nanoparticles Having Uniform Distribution on Small Surface 小表面均匀分布金属氧化物纳米粒子火花放电沉积系统的研制

IF 0.7 4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-04-01 DOI: 10.12693/aphyspola.143.284

F. Güngör, E. Güngör, T. Güngör

引用次数: 0

Use of Anionic Surfactant Sodium Lauryl Ether Sulfate as a Capping Agent in Metal-Chalcogenide PbS Thin Film Production 阴离子表面活性剂十二烷基醚硫酸钠在金属硫系PbS薄膜生产中的封盖作用

IF 0.7 4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-04-01 DOI: 10.12693/aphyspola.143.290

E. Yücel

引用次数: 2

Vertex Simulation of Grain Growth in the Presence of Zener Pinning Effect 齐纳钉扎效应下晶粒生长的顶点模拟