Doklady Physics最新文献_第5页

Interface Trap-Induced Impact in Linearity and Small-Signal Performance of InAs-Channel TFETs: Reliability Implications 接口陷阱诱导的对InAs-Channel tfet线性度和小信号性能的影响：可靠性影响

IF 0.5 4区物理与天体物理

Doklady Physics Pub Date : 2025-11-20 DOI: 10.1134/S1028335825600671

Vedvrat, Rajeev Kumar Sachan

{"title":"Interface Trap-Induced Impact in Linearity and Small-Signal Performance of InAs-Channel TFETs: Reliability Implications","authors":"Vedvrat, Rajeev Kumar Sachan","doi":"10.1134/S1028335825600671","DOIUrl":"10.1134/S1028335825600671","url":null,"abstract":"The accrual of interface trap charges (ITC) at the margin of InAs/SiO2 and HfO2 interfaces considerably influences the performance and reliability of tunnel field effect transistor (TFET) devices, emphasising the need to address this issue. This work provides a thorough analysis of how interface trap charges (ITCs) affect the suggested device, the nonuniform InAs-channel dual metal hetero-oxide double-gate TFET (InAs-NUC-TFET), in terms of critical performance metrics like DC characteristics and analog/RF electrical performance. Both positive and negative ITCs were analysed to determine how they affected the device. The results demonstrate that variations in ITC concentrations have little impact on the device’s performance metrics, emphasising that InAs-NUC-TFETs are more resilient to ITCs compared to conventional semiconductor devices, which frequently suffer significant performance due to ITCs. For trap charges with minimum values of –1 × 1012 and maximum values of 1 × 1012, the deviations in ON-current, OFF-current, and their ratio are 26, 18, and 10%, respectively. In addition to demonstrating resistance to trap charges, the device has a high current ratio (4.32 × 1013) and an ON-current in milli-amperes. It is positioned as a possible contender for future electronics, especially for low power and high frequency applications, due to its remarkable performance under various situations and resistance to ITCs.","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"70 5-8","pages":"61 - 72"},"PeriodicalIF":0.5,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950780","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

Investigation of Magnetocaloric Properties and Magnetic Phase Transition in Cobalt-Doped La0.8Ca0.2MnO3 Perovskites Using a Phenomenological Model 用现象学模型研究钴掺杂La0.8Ca0.2MnO3钙钛矿的磁热性能和磁相变

IF 0.5 4区物理与天体物理

Doklady Physics Pub Date : 2025-11-20 DOI: 10.1134/S1028335825600622

B. Dey, A. Basu, S. Pal, S. Kumar

{"title":"Investigation of Magnetocaloric Properties and Magnetic Phase Transition in Cobalt-Doped La0.8Ca0.2MnO3 Perovskites Using a Phenomenological Model","authors":"B. Dey, A. Basu, S. Pal, S. Kumar","doi":"10.1134/S1028335825600622","DOIUrl":"10.1134/S1028335825600622","url":null,"abstract":"The prospect of La0.8Ca0.2Mn1–xCoxO3 (0 ≤ x ≤ 0.3) perovskite oxides as magnetocaloric effect (MCE) based magnetic refrigerant has been explored. A phenomenological model has been employed to investigate various magnetocaloric properties, including magnetic entropy change (∆S), heat capacity change (∆C), full width at half band width (δTFWHM), adiabatic temperature change (ΔTad) and relative cooling power (RCP) through the study of temperature dependence of magnetization. Using this model, the magnetocaloric property values are predicted by calculating the magnetization data under varying external magnetic fields. Since magnetization reduces abruptly near TC a significant change in magnetic entropy change, heat capacity change and adiabatic temperature change occur. We observe as the doping concentration increases an enhancement in the predicted values of magnetocaloric parameters occur with the increasing magnetic field possibly due to the switching of the magnetic phase transition (MPT) in the material from first to second order. Thus, the results highlight the compounds as strong contenders for cooling applications across a broad range around room temperature. Moreover, the analysis affirms the extent of validity of the phenomenological model.","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"70 5-8","pages":"37 - 48"},"PeriodicalIF":0.5,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950764","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

A Phase-Change Material with Enhanced Thermal Conductivity 一种具有增强导热性的相变材料

IF 0.5 4区物理与天体物理

Doklady Physics Pub Date : 2025-10-13 DOI: 10.1134/S1028335825700077

A. O. Vagin, A. V. Eletskii

{"title":"A Phase-Change Material with Enhanced Thermal Conductivity","authors":"A. O. Vagin, A. V. Eletskii","doi":"10.1134/S1028335825700077","DOIUrl":"10.1134/S1028335825700077","url":null,"abstract":"<div>Phase-change materials (PCMs) are capable of storing or releasing significant thermal energy as a result of a phase transition, which is the reason that they find application in temperature stabilization systems inside residential and industrial premises and in complex computer systems, as well as for accumulating thermal energy for use during periods of peak demand. The problem with using PCMs is associated with the low thermal conductivity of these materials, which causes high inertia in systems based on them. To overcome this problem, an additive of nanocarbon particles (carbon nanotubes, graphene, and graphene oxide) is used, whose thermal conductivity coefficient is 4 to 5 orders of magnitude higher than the corresponding value for PCMs. The high cost of nanocarbon particles requires careful attention to determining the optimal amount of nanocarbon additive that provides the maximum intensity of heat exchange between the PCM and the working fluid, taking into account the phase transition. The report sets up and solves a model problem of heat exchange between a fluid pumped through a pipe and a PCM enclosed in an external pipeline. The dependences of the characteristic heat exchange time on the composite’s thermal conductivity, calculated using the Comsol Multiphysics software package, have a decreasing nature and saturate at thermal conductivity values approximately 25 times higher than the initial value for the PCM. This behavior is due to the contribution of convection of the liquid PCM to heat transfer.</div>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"70 9-12","pages":"73 - 77"},"PeriodicalIF":0.5,"publicationDate":"2025-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145950781","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

Numerical Simulation of the Initial Stage of the Formation of the Popigai Crater 波皮盖陨石坑形成初期的数值模拟

IF 0.5 4区物理与天体物理

Doklady Physics Pub Date : 2025-07-21 DOI: 10.1134/S1028335824600627

V. V. Kim, S. I. Martynenko, A. V. Ostrik, K. V. Khishchenko, I. V. Lomonosov

引用次数: 0

Synthesis of Graphene Oxide/Chitosan Scaffolds for Bone Regeneration and Fracture Treatment 氧化石墨烯/壳聚糖骨再生与骨折治疗支架的合成

IF 0.5 4区物理与天体物理

Doklady Physics Pub Date : 2025-07-21 DOI: 10.1134/S1028335824600500

Zhilin Yang

引用次数: 0

Comprehensive Insights into Some Nanoferrites: Properties, Characterization, and Multifaceted Applications 一些纳米铁素体的综合见解：性质，表征和多方面的应用

IF 0.5 4区物理与天体物理

Doklady Physics Pub Date : 2025-07-21 DOI: 10.1134/S1028335824600287

Rakesh Vishwarup, Shridhar N. Mathad

引用次数: 0

The Equations of State of Carbon-Fiber Composite, Epoxy Resin, and Carbon and the Principle of Additivity at High Pressures 高压下碳纤维复合材料、环氧树脂和碳的状态方程及可加性原理

IF 0.5 4区物理与天体物理

Doklady Physics Pub Date : 2025-07-03 DOI: 10.1134/S1028335824600639

I. V. Lomonosov

引用次数: 0

Development of Gd-Doped C–Al2O3 Nanospheres for Biomedical Application in Drug Delivery gd掺杂C-Al2O3纳米微球在生物医学药物传递中的应用

IF 0.5 4区物理与天体物理

Doklady Physics Pub Date : 2025-07-03 DOI: 10.1134/S1028335824600561

Tahseen Sana, Hafeez Ullah, Muhammad Abdul Majid, Zahida Batool, Syed Mujtaba ul Hassan, Wesam Atef Hatamleh, Muhammad Umar Dad

{"title":"Development of Gd-Doped C–Al2O3 Nanospheres for Biomedical Application in Drug Delivery","authors":"Tahseen Sana, Hafeez Ullah, Muhammad Abdul Majid, Zahida Batool, Syed Mujtaba ul Hassan, Wesam Atef Hatamleh, Muhammad Umar Dad","doi":"10.1134/S1028335824600561","DOIUrl":"10.1134/S1028335824600561","url":null,"abstract":"This research focuses on the Gd-doped carbon alumina nanospheres manufactured through a hydrothermal synthesis routes for their application in drug delivery. A facile two-step hydrothermal process was used to form the alumina spheres. In the initial stage at 90°C, gadolinium chloride hexahydrate was achieved through gadolinium oxide with the excess of hydrochloric acid. In the final stage, the formation of Gd-doped alumina in the hydrothermal reactor, followed by a combination of aluminum nitrate nanohydrate, glucose, gadolinium chloride and annealed at 450°C in the furnace, was achieved. The structural characterization of the powdered sample was performed with the help of SEM and XRD. The results of XRD showed the amorphous nature of alumina obtained after annealing. No peak of Gd was confirmed due to its lower concentration in the XRD pattern. The broad diffraction peaks of alumina were observed due to the high water content and weak crystalline structure. The outcomes of SEM showed that the synthesized Gd-doped alumina possessed spherical morphology. Before annealing, the average size was observed to be 1.69 µm. The composition analysis was done through EDX which confirmed the existence of aluminum, oxygen, and Gd. The functional group of PEG-coated alumina has been examined with the help of FTIR spectroscopy. The MTT assay has confirmed that the sample is biocompatible and can be used as a drug carrier.","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"69 10-12","pages":"97 - 103"},"PeriodicalIF":0.5,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161376","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

Symmetries of the Classical Heisenberg Model 经典海森堡模型的对称性

IF 0.5 4区物理与天体物理

Doklady Physics Pub Date : 2025-07-03 DOI: 10.1134/S1028335824600305

A. B. Borisov, D. V. Dolgikh

引用次数: 0

The Dependence of the Elemental Composition of AlN Films on the Ratio of Argon and Nitrogen in a Plasma-Forming Gas Stream during Magnetron Sputtering of an Aluminum Target 铝靶磁控溅射过程中等离子体形成气流中氩氮比对氮膜元素组成的影响

IF 0.5 4区物理与天体物理

Doklady Physics Pub Date : 2025-07-03 DOI: 10.1134/S1028335825600014

B. T. Baisova, L. V. Baranova, V. I. Strunin

引用次数: 0