Results in Physics最新文献

Validity of the phenomenological model for magnetocaloric effects in MnFeP2/3Si1/3

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-01 DOI: 10.1016/j.rinp.2025.108231

Ahmed R. Galaly , Tahani R. Aldhafeeri , Sameh M. Elghnam , Mahmoud A. Hamad

{"title":"Validity of the phenomenological model for magnetocaloric effects in MnFeP2/3Si1/3","authors":"Ahmed R. Galaly , Tahani R. Aldhafeeri , Sameh M. Elghnam , Mahmoud A. Hamad","doi":"10.1016/j.rinp.2025.108231","DOIUrl":"10.1016/j.rinp.2025.108231","url":null,"abstract":"<div><div>Assessing the validity of the phenomenological model (PM) for the magnetocaloric effect (MCE) in MnFeP<sub>2/3</sub>Si<sub>1/3</sub> is the aim of this study. Our work confirms PM for conventional MCE by simulating the MCE of MnFeP<sub>2/3</sub>Si<sub>1/3</sub> at temperatures between 230 K and 310 K. Interestingly, there is a good degree of precision across the whole temperature range in the agreement between the simulated magnetic entropy change (10.1 J/kg.K) and the reported one. Additionally, MnFeP<sub>2/3</sub>Si<sub>1/3</sub>′s relative cooling power is evaluated to be 97 J/kg, and heat capacity change characterization is investigated. By reducing the time and effort required to calculate and measure MCE, these results imply that PM is a trustworthy model for investigating MCE in the sharp magnetic transition. Consequently, the PM is very useful for estimating the MCE of magnets, as the MnFeP<sub>2/3</sub>Si<sub>1/3</sub> sample has a sharp magnetic transition. Consequently, we believe that the PM can also be used for predicting MCE parameters for any magnetic transition.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108231"},"PeriodicalIF":4.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

International Advisory Board

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-01 DOI: 10.1016/S2211-3797(25)00131-7

引用次数: 0

Optimization of WS2 layer thickness for enhanced performance in self-powered gas sensors

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-04-01 DOI: 10.1016/j.rinp.2025.108232

Monireh Jafari , Mohammad Mahdi Shahidi , Mohammad Hossein Ehsani

{"title":"Optimization of WS2 layer thickness for enhanced performance in self-powered gas sensors","authors":"Monireh Jafari , Mohammad Mahdi Shahidi , Mohammad Hossein Ehsani","doi":"10.1016/j.rinp.2025.108232","DOIUrl":"10.1016/j.rinp.2025.108232","url":null,"abstract":"<div><div>The WS<sub>2</sub> thin films were deposited on glass substrates using RF magnetron sputtering using a tungsten sulfide target to study the effect of WS<sub>2</sub> layer thickness on the properties of the thin films. To analyze the morphological, structural, optical, electrical, and gas sensor characteristics of the thin films. The FESEM images indicated that samples have nanoparticles with 50, 150, and 250 nm thicknesses. The 50 and 250 nm and the sample of 150 nm have preferred orientations of (104) and (009), respectively. The 150 nm sample has a larger crystallite size than the other two samples and, as a result, has better crystallinity. Additionally, the Urbach energy calculation showed that the 150 nm sample had the lowest Urbach energy (74 meV), confirming better crystallinity and fewer crystal defects. The indirect band gap of the samples with increasing thickness is 1.89, 1.35, and 1.55 eV, respectively, which indicates that the 150 nm sample has the closest band gap value to the bulk state. Among the samples, the sample of 150 nm, which has better crystallinity and fewer crystal defects, has responded to the gas sensing of ethanol and ammonia in the self-powered mode. Measurements were performed at 500, 1500, and 2000 ppm and the recovery time for ethanol gas was 41.28 s.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108232"},"PeriodicalIF":4.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating rheological characteristics of nonlinear fluid model in a curved channel with corrugated permeable walls under convective constraints

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-03-31 DOI: 10.1016/j.rinp.2025.108234

M. Mujahid, Z. Abbas, M.Y. Rafiq

{"title":"Investigating rheological characteristics of nonlinear fluid model in a curved channel with corrugated permeable walls under convective constraints","authors":"M. Mujahid, Z. Abbas, M.Y. Rafiq","doi":"10.1016/j.rinp.2025.108234","DOIUrl":"10.1016/j.rinp.2025.108234","url":null,"abstract":"<div><div>This study presents a comprehensive analysis of the pressure-driven flow dynamics of magnetized Ree-Eyring fluid through a permeable corrugated curved channel under convective constraints. The intricate geometry of the channel is precisely formulated using an orthogonal curvilinear coordinate system, ensuring an accurate representation of the complex structure. The corrugations along the channel walls are mathematically modeled using sinusoidal functions, incorporating a well-defined phase difference to depict the wavy nature of the boundaries. To facilitate analytical treatment, the initially complex boundary layer equations, formulated as a system of partial differential equations, are efficiently transformed into a solvable set of ordinary differential equations using the perturbation method. This approach enables the derivation of an exact solution for velocity, temperature distribution, and volumetric flow rate, with the corrugation amplitude serving as the perturbation parameter. Key parameter effects are vividly illustrated through detailed graphical representations. Furthermore, the skin friction coefficient and local Nusselt number are computed using advanced numerical techniques, with results systematically presented in a comprehensive tabular format across a wide range of parametric values. The study has diverse applications, particularly in biomedical engineering for simulating arterial blood flow and designing stents. It also benefits industrial heat exchangers, microfluidic devices, magnetohydrodynamics systems, and aerospace cooling technologies. The findings contribute valuable insights into fluid mechanics, optimizing flow, and heat transfer in various engineering and scientific applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"72 ","pages":"Article 108234"},"PeriodicalIF":4.4,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-band cross-polarization and linear-to-circular polarization converting metasurface 双波段交叉极化和线性-圆极化转换元表面

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-03-31 DOI: 10.1016/j.rinp.2025.108222

Abdullah , Babar Kamal , Sadiq Ullah , Ashfaq Ahmad , Dong-you Choi

引用次数: 0

Efficient fiber-chip coupler based on photonic jet

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-03-31 DOI: 10.1016/j.rinp.2025.108241

Yu-Jing Yang , De-Long Zhang , Sai-Dong Xue , Ning Yuan

引用次数: 0

Retraction notice to “Computational modeling of wave propagation in plasma physics over the Gilson–Pickering equation” [Res. Phys. 50 (2023) 106579]

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-03-28 DOI: 10.1016/j.rinp.2025.108221

Xia Liu , Baraa Abd Alreda , Jalil Manafian , Baharak Eslami , Mehdi Fazli Aghdaei , Mostafa Abotaleb , Ammar Kadi

引用次数: 0

Retraction notice to “New impressive performances for the analytical solutions to the (1+1)-dimensional van der-waals gas system against its numerical solutions” [Res. Phys. 51 (2023) 106667]

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-03-28 DOI: 10.1016/j.rinp.2025.108220

Emad H.M. Zahran , Hijaz Ahmad , Sameh Askar , Dilber Uzun Ozsahin

引用次数: 0

Retraction notice to “Iron and vanadium co-doped WO3 nanomaterial and their composites for waste water applications” [Res. Phys. 55 (2023) 107142]

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-03-28 DOI: 10.1016/j.rinp.2025.108223

Nada Alfryyan , Imed Boukhris , Sajida Parveen , Kheir S. Albarkaty , Z.A. Alrowaili , M.S. Al-Buriahi , Khadija Chaudhary , Imran Shakir , Muhammad Farooq Warsi

引用次数: 0

Retraction notice to “Rational solutions and some interactions phenomena of a (3+1)-dimensional BLMP equation in incompressible fluids: A Hirota bilinear method and dimensionally reduction approach” [Results Phys. 56 (2024) 107269]

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-03-28 DOI: 10.1016/j.rinp.2025.108226

Mati ur Rahman , Mohammad Alqudah , Meraj Ali Khan , Bent Elmina Haroun Ali , Shabir Ahmad , Emad E. Mahmoud , Mei Sun

引用次数: 0