Results in Physics最新文献_第2页

Investigating the Characteristics of Fe3-xZnxO4 Nanoparticles: An Experimental and Theoretical Approach 研究Fe3-xZnxO4纳米颗粒的特性：实验和理论方法

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-22 DOI: 10.1016/j.rinp.2025.108269

Zahra Mosleh, Shiva Moorchegani, Parviz Kameli

{"title":"Investigating the Characteristics of Fe3-xZnxO4 Nanoparticles: An Experimental and Theoretical Approach","authors":"Zahra Mosleh, Shiva Moorchegani, Parviz Kameli","doi":"10.1016/j.rinp.2025.108269","DOIUrl":"10.1016/j.rinp.2025.108269","url":null,"abstract":"<div><div>This study investigates the structural, electronic, and magnetic properties of Fe<sub>3-</sub><em><sub>x</sub></em>Zn<em><sub>x</sub></em>O<sub>4</sub> nanoparticles to understand the effects of Zn doping. The nanoparticles were synthesized using the hydrothermal method, and their properties were analyzed through X-ray diffraction (XRD), Density Of States (DOS) calculations, and magnetic measurements, supported by first-principles simulations. The results revealed a cubic spinel structure, with the lattice parameter expanding as Zn<sup>2+</sup> substitution increased due to its larger ionic radius. Electronic properties indicated semiconducting behavior, with band gaps of 1.02 eV for Fe<sub>3</sub>O<sub>4</sub> (x = 0) and 1.85 eV for ZnFe<sub>2</sub>O<sub>4</sub> (x = 1). Magnetization initially increased with Zn doping up to x = 0.2 but decreased at higher concentrations due to cation migration within the lattice. Fe<sub>3</sub>O<sub>4</sub> exhibited a net magnetic moment of 4µ<em><sub>B</sub></em>, while ZnFe<sub>2</sub>O<sub>4</sub> showed antiferromagnetic ordering with zero net magnetic moment, consistent with theoretical predictions. The study concludes that Zn doping significantly influences the structural, electronic, and magnetic properties of Fe<sub>3-</sub><em><sub>x</sub></em>Zn<em><sub>x</sub></em>O<sub>4</sub> nanoparticles, providing a comprehensive understanding of their functional characteristics. This study highlights the innovative integration of experimental and theoretical methods to investigate the impact of Zn substitution on Fe<sub>3</sub>O<sub>4</sub> nanoparticles, representing a novel contribution to the field.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108269"},"PeriodicalIF":4.4,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Unraveling the structural stability and UV optical response of Mn-doped Sr2LaSbO6 via DFT investigations 通过DFT研究揭示mn掺杂Sr2LaSbO6的结构稳定性和紫外光学响应

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-21 DOI: 10.1016/j.rinp.2025.108267

Nasir Rahman , Khamael M. Abualnaja , Soufyane Belhachi , Mohamed Hussien , Vineet Tirth , Mudasser Husain , Ahmed Azzouz-Rached , Q. Humayun , Abid Ali Khan , Nazish

{"title":"Unraveling the structural stability and UV optical response of Mn-doped Sr2LaSbO6 via DFT investigations","authors":"Nasir Rahman , Khamael M. Abualnaja , Soufyane Belhachi , Mohamed Hussien , Vineet Tirth , Mudasser Husain , Ahmed Azzouz-Rached , Q. Humayun , Abid Ali Khan , Nazish","doi":"10.1016/j.rinp.2025.108267","DOIUrl":"10.1016/j.rinp.2025.108267","url":null,"abstract":"<div><div>Sr<sub>2</sub>LaSbO<sub>6</sub> is a double perovskite of the A<sub>2</sub>BB′O<sub>6</sub> type, comprising SbO<sub>6</sub> octahedra, and exhibits promising luminescent properties when activated by Mn4<sup>+</sup> ions. First-principles Density Functional Theory (DFT) calculations were performed to investigate the structural, electronic, magnetic, and optical properties of Mn-doped SLSO. Structural stability was confirmed through the Birch–Murnaghan equation of state by determining the ground-state energy. Due to electron transfer, the moderate ionic bonding between La/Sb and the more electronegative O atoms contributes to the structural stability of the compound. Mn-doped Sr<sub>2</sub>LaSbO<sub>6</sub> exhibits metallic behaviour in the spin-up channel with states crossing the Fermi level, while the spin-down channel remains semiconducting, confirming its half-metallic character. Manganese (Mn) ions exhibit a high positive magnetic moment, contributing significantly to the overall ferromagnetic behaviour of the compound. The small positive magnetic moment observed on oxygen (O) atoms is likely due to spin polarization induced by interactions with neighbouring magnetic Mn ions. Optical property calculations indicate that the material exhibits a strong optical response, primarily in the ultraviolet region. This research established that Mn-doped Sr<sub>2</sub>LaSbO<sub>6</sub> demonstrates structural stability, half-metallic ferromagnetism, and a strong ultraviolet optical response, making it a promising candidate for spintronic and optoelectronic applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108267"},"PeriodicalIF":4.4,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Dynamics of fractional stochastic Burgers–Huxley equation with Lévy noise 带lsamvy噪声的分数阶随机Burgers-Huxley方程动力学

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-15 DOI: 10.1016/j.rinp.2025.108235

Zaitang Huang , Yousu Huang

引用次数: 0

A dynamic sintering-forging integrated method for synergetic controlling W-Ti refractory alloy with high densities, fine grains and low titanium-rich content 一种动态烧结-锻造一体化方法协同控制高密度、细晶、低富钛含量W-Ti耐火合金

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-14 DOI: 10.1016/j.rinp.2025.108263

Ka Gao , Yanghu Hu , Zixiang Zhang , Yuan Rao , Yufan Tang , Qiang Li , Dejian Sun , Yang Gao , Li Dang , Hailong Wang , Haiou Zhuo , Biao Guo , Linan An

{"title":"A dynamic sintering-forging integrated method for synergetic controlling W-Ti refractory alloy with high densities, fine grains and low titanium-rich content","authors":"Ka Gao , Yanghu Hu , Zixiang Zhang , Yuan Rao , Yufan Tang , Qiang Li , Dejian Sun , Yang Gao , Li Dang , Hailong Wang , Haiou Zhuo , Biao Guo , Linan An","doi":"10.1016/j.rinp.2025.108263","DOIUrl":"10.1016/j.rinp.2025.108263","url":null,"abstract":"<div><div>The synergistic controlling of high densities, fine grain sizes, and low titanium-rich phase content is critical for high sputtering quality of W-Ti refractory alloy targets. In this work, high-performance W-Ti alloy targets have been successfully designed and prepared for the first time by using the dynamic sintering and forging (DSF) integrated method. Compared to hot press (HP) and hot oscillating pressing (HOP), DSF can achieve a relative density of 99.31 % for W-Ti alloys at a lower temperature of 1100 °C (more than 200 °C lower than the above methods). Moreover, its grain size was not grown abnormally and the formation of the Ti-rich phase was suppressed not to be observed. This had never been achieved in previous studies. The DSF integrated method preliminarily achieved the synergistic control of high densities, fine-grain sizes, and low titanium-rich phase content, which achievement provides a technical reference for the preparation of high-performance refractory alloy targets at low temperatures.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108263"},"PeriodicalIF":4.4,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Determination of the Half-Beam cone angle for Pierce electron gun design using an artificial neural network 用人工神经网络确定皮尔斯电子枪半束锥角

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-14 DOI: 10.1016/j.rinp.2025.108256

R. Panahi , S.A.H. Feghhi , Sh. Sanaye Hajari , M. Khorsandi

引用次数: 0

Multilayer broadband metamaterial for microwave absorption based on resistive frequency selective surfaces 基于电阻频率选择表面的多层宽带微波吸收材料

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-13 DOI: 10.1016/j.rinp.2025.108261

Dongsheng Zhang , Yanfei Chen , Qian Zhou

{"title":"Multilayer broadband metamaterial for microwave absorption based on resistive frequency selective surfaces","authors":"Dongsheng Zhang , Yanfei Chen , Qian Zhou","doi":"10.1016/j.rinp.2025.108261","DOIUrl":"10.1016/j.rinp.2025.108261","url":null,"abstract":"<div><div>Achieving broadband electromagnetic wave absorption utilizating the multilayer Frequency Selective Surfaces (FSS) constitutes an effective strategy for designing ultra-thin electromagnetic protection devices. In this study, we propose a thin, broadband, and polarization-insensitive multilayer absorber. The structure encompasses two layers of FSS, a layer of polymethacrylimide (PMI) foam substrate, two additional dielectric layers of quartz glass, and a metallic ground plane. By synergistically optimizing the material parameters and the geometric configuration of the metasurface, the resultant metamaterial demonstrates absorption rates exceeding 90 % within the frequency range of 3.1–18 GHz, which spans the entire C, X, and Ku bands. Experimental results corroborate the exceptional absorption performance of the material, exhibiting good agreement with simulation outcomes. Notably, the absorber exhibits remarkable stability under oblique incidence, maintaining absorption rates above 80 % for both TE and TM polarized waves across incident angles ranging from 0° to 45° within the aforementioned frequency range. A comprehensive analysis of the polarization-insensitive broadband absorption mechanism is conducted, offering pivotal insights for the design of ultra-thin electromagnetic protection devices.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108261"},"PeriodicalIF":4.4,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Synthesis of ZnSe QDs: Effects of stabilizer on the optical properties and structural morphology ZnSe量子点的合成：稳定剂对其光学性能和结构形貌的影响

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-13 DOI: 10.1016/j.rinp.2025.108262

Siphe Somathube , Olamide Abiodun Daramola , Pathy Bahati Lokole , Justin Bazibuhe Safari , Xavier Siwe-Noundou , Francis Birhanu Dejene

{"title":"Synthesis of ZnSe QDs: Effects of stabilizer on the optical properties and structural morphology","authors":"Siphe Somathube , Olamide Abiodun Daramola , Pathy Bahati Lokole , Justin Bazibuhe Safari , Xavier Siwe-Noundou , Francis Birhanu Dejene","doi":"10.1016/j.rinp.2025.108262","DOIUrl":"10.1016/j.rinp.2025.108262","url":null,"abstract":"<div><div>In this study, zinc selenide quantum dots (ZnSe QDs) were synthesized using a colloidal method with three stabilizers: 3-mercaptopropionic acid (MPA), glutathione (GSH), and a combination of MPA-GSH. The QDs were analysed using various techniques to understand the impact of the stabilizers on the optical, morphological and structural properties of the synthesized QDs. The results demonstrate that the choice of stabilizer significantly affects the properties of the synthesized QDs. MPA-capped QDs exhibited superior photoluminescence intensity (67%), followed by GSH-capped QDs (22%) and MPA-GSH-capped QDs (19 %). The ultraviolent visible (UV–Vis) absorption spectra reveal different bands for the capping ligands, and the energy band gap for the QDs was evaluated using the TAUC plots and the derivation of the absorption spectrum fitting method (DASF) method. The X-ray diffraction (XRD) patterns indicate that MPA and MPA-GSH-capped QDs demonstrate higher crystallinity, while GSH-capped QDs show some amorphous structures with broad size distribution. The estimated strain and dislocation density indicate that even though the defect density generated inside the crystalline lattice of MPA-capped QDs is high, the internal stress produced was smaller than GSH and MPA–GSH-capped QDs. The scanning electron microscope (SEM) images for MPA-capped QDs show higher mono-dispersity with bigger particle sizes. In contrast, GSH-capped QDs show smaller particle sizes, and MPA-GSH demonstrated particles with mixed morphology. These findings are important as they provide valuable insights into tuning the optical and structural properties of ZnSe QDs, opening new possibilities for their potential applications in optoelectronics and biomedical imaging.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108262"},"PeriodicalIF":4.4,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

The weak equivalence principle and the Dirac constant: A result from the holographic principle 弱等效原理与狄拉克常数：全息原理的一个结果

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-12 DOI: 10.1016/j.rinp.2025.108244

Eiji Konishi

引用次数: 0

Bell–Mermin–Klyshko inequalities and one-way information deficit of Dirac fields in noninertial frames 非惯性系中Dirac场的Bell-Mermin-Klyshko不等式和单向信息亏缺

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-11 DOI: 10.1016/j.rinp.2025.108246

Biao-Liang Ye , Yao-Kun Wang , Shao-Ming Fei

引用次数: 0

Polydisperse stickiness and particle size on light scattering in dense colloidal suspensions: A numerical study using the binary sticky hard-sphere model 稠密胶状悬浮液中光散射对多分散黏性和粒径的影响：二元黏性硬球模型的数值研究

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-10 DOI: 10.1016/j.rinp.2025.108247

Hiroyuki Fujii , Koyata Nishikawa, Hyeonwoo Na, Kazumichi Kobayashi, Masao Watanabe

{"title":"Polydisperse stickiness and particle size on light scattering in dense colloidal suspensions: A numerical study using the binary sticky hard-sphere model","authors":"Hiroyuki Fujii , Koyata Nishikawa, Hyeonwoo Na, Kazumichi Kobayashi, Masao Watanabe","doi":"10.1016/j.rinp.2025.108247","DOIUrl":"10.1016/j.rinp.2025.108247","url":null,"abstract":"<div><div>In nanotechnology using scattered light and colloidal science, it is crucial to model the agglomeration of submicrometer-scale particles and light scattering in dense colloidal suspensions and clarify the quantitative relation between them. We numerically examined the effects of polydisperse stickiness and particle sizes on the scattering properties in the near-infrared optical wavelength using the dependent scattering theory (one of the electromagnetic theory) and bidisperse (binary) sticky hard-sphere (SHS) model at different stickiness parameters and particle sizes. The SHS model has been widely employed as a particle interaction model, but most previous works are for a monodisperse system. Actual suspensions are polydisperse, and our simple bidisperse models allow us to provide a physical interpretation of the two polydisperse effects. We showed that polydisperse stickiness contributions are effectively reduced to monodisperse cases with a mean value of the stickiness parameters. Meanwhile, we showed strong effects of the polydisperse particle size, and its contribution is not reduced to a monodisperse case. At a small particle size (around 100 nm), the polydispersity effects enhance the scattering properties even in the diffusive region of radiative transfer.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108247"},"PeriodicalIF":4.4,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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