Results in Physics最新文献

Large and reversible elastocaloric effect induced by low stress in a Ga-doped Ni-Mn-Ti alloy 掺镓镍锰钛合金中的低应力诱发的巨大可逆弹性效应

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2024-10-12 DOI: 10.1016/j.rinp.2024.108009

{"title":"Large and reversible elastocaloric effect induced by low stress in a Ga-doped Ni-Mn-Ti alloy","authors":"","doi":"10.1016/j.rinp.2024.108009","DOIUrl":"10.1016/j.rinp.2024.108009","url":null,"abstract":"<div><div>The Solid-state cooling based on caloric effects is considered a potential alternative to conventional refrigeration technology, which uses ozone-depleting gases. Several shape memory alloys have attracted attention for solid-state cooling since they present a high reversibility of the caloric effect, which depends mainly on thermal hysteresis and sensitivity to the applied field. In the present work, a study substitution of Mn by Ga in the Ni<sub>50</sub>Mn<sub>34</sub>Ti<sub>16</sub> alloy led to diminished thermal hysteresis in the martensitic transformation by 9 K. The elastocaloric effect, thermal and microstructure properties of a polycrystalline Ni<sub>50</sub>Mn<sub>32</sub>Ti<sub>16</sub>Ga<sub>2</sub> alloy have been characterized. The elastocaloric effect was obtained indirectly from the length change as a function of temperature at constant stress. An isothermal entropy change (Δ<em>S</em><sub>ISO</sub>) of 23.0 J kg<sup>−1</sup> K<sup>−1</sup> during heating and 22.0 J kg<sup>−1</sup> K<sup>−1</sup> during cooling was observed for applied stress of 160 MPa. In addition, the Δ<em>S</em><sub>ISO</sub> is reversible for a temperature span between 287 and 319 K, reaching a maximum of 20.5 J kg<sup>−1</sup> K<sup>−1</sup> at 299 K. The thermal hysteresis changed slightly while the applied stress increased up to 160 MPa since the sensitivity of the martensitic transformation temperatures to stress was 0.150 K/MPa during cooling and 0.160 K/MPa during heating. The X-ray diffraction analysis revealed a mixture of B2-type cubic austenite, 5M modulated martensite, and a second intermetallic phase identified as Ni<sub>3</sub>Ti. All these results were obtained around room temperature.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434412","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

Modification of microstructural, mechanical and optical properties with carbon ion irradiation in Y2SiO5 crystals 碳离子辐照改变 Y2SiO5 晶体的微观结构、机械和光学特性

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2024-10-12 DOI: 10.1016/j.rinp.2024.108015

{"title":"Modification of microstructural, mechanical and optical properties with carbon ion irradiation in Y2SiO5 crystals","authors":"","doi":"10.1016/j.rinp.2024.108015","DOIUrl":"10.1016/j.rinp.2024.108015","url":null,"abstract":"<div><div>Yttrium orthosilicate Y<sub>2</sub>SiO<sub>5</sub> crystals, a member of the silicate family, are versatile and multifunctional materials when doped with rare earth or transition metal ions. However, there have been limited investigations into the impact of ion irradiation on the crystal structure of Y<sub>2</sub>SiO<sub>5</sub> crystals to date. In this paper, the effect of microstructure, mechanical and optical properties of Y<sub>2</sub>SiO<sub>5</sub> crystal before and after different fluences of carbon ions irradiation was investigated utilizing complementary characterization techniques. The results indicate that carbon ion irradiation caused lattice disorder and damage, which resulted in structural deterioration and changes in optical properties, such as decrease in the optical band gap energy (from5.77 eV to 5.44 eV), changes in the effective refractive index (<em>n<sub>eff</sub>)</em> which resulted in the formation of “well + barrier” type and “barrier” type waveguides. In addition, elastic modulus increased after carbon ion irradiation. The results will be helpful for understanding the damage study of the Y<sub>2</sub>SiO<sub>5</sub> crystal with carbon ion irradiation and proving that ion beam techniques can be used for material modification.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438367","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

Combined etching technology for controlling surface damage precursors to improve laser damage resistance of fused silica 控制表面损伤前体的组合蚀刻技术，提高熔融石英的抗激光损伤能力

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2024-10-11 DOI: 10.1016/j.rinp.2024.108011

{"title":"Combined etching technology for controlling surface damage precursors to improve laser damage resistance of fused silica","authors":"","doi":"10.1016/j.rinp.2024.108011","DOIUrl":"10.1016/j.rinp.2024.108011","url":null,"abstract":"<div><div>At present, a single post-processing technology will always introduce secondary defects (trace pollution elements and structural defects) while removing surface processing defects of fused silica components, which limits the further improvement of the laser damage threshold of the components. Therefore, to effectively remove surface defects in optically-processed fused silica and suppress defect regeneration is the key to improve the laser damage resistance performance of the components. Based on the complementarity of anisotropic ion beam etching and isotropic HF acid etching, a combined etching technology is proposed for fused silica components used in engineering. The combined etching can remove most of the fragmented defects on fused silica surface to achieve relatively good surface quality with a root mean square roughness of 0.666 nm. After the combined etching, the contents of most impurity elements decrease by approximately an order of magnitude. Besides, the contents of the structural defects significantly reduce. Therefore, The zero probability damage threshold and the 100 % probability damage threshold increase by 32.41 % and 57.46 %, respectively. The results show that the combined etching technology can effectively improve the laser damage resistance performance of fused silica components, especially under high fluence laser irradiation, which is very important for the high power output and stable operation of laser facilities.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434364","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 radiation shielding parameters for X-ray attenuation at various energies in locally produced ceramic materials used in Saudi Arabia 研究沙特阿拉伯当地生产的陶瓷材料在不同能量下衰减 X 射线的辐射屏蔽参数

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2024-10-10 DOI: 10.1016/j.rinp.2024.108006

{"title":"Investigating radiation shielding parameters for X-ray attenuation at various energies in locally produced ceramic materials used in Saudi Arabia","authors":"","doi":"10.1016/j.rinp.2024.108006","DOIUrl":"10.1016/j.rinp.2024.108006","url":null,"abstract":"<div><div>To assess shielding effectiveness against X-rays, a number of locally collected ceramic samples were obtained from the Kingdom of Saudi Arabia. Based on elemental analysis, all of the ceramic samples have a density in the range of 1.68–1.85 g/cm<sup>3</sup>, with the highest proportions of O, Si, C, and Al atoms and the lowest amounts of Na, Mg, K, Ca, Ti, and Fe. The 320 kV X-ray source (Gulmay Limited, Byfleet, UK) was used to assess the attenuation properties of the ceramic samples. An Exradin A4 ionization chamber (Standard Imaging, Middleton, USA) connected to a UNIDOS electrometer (PTW, Freiburg, Germany) in the control room was used to detect the attenuation properties. Several X-ray attenuation coefficients are evaluated at different X-ray energies in the range of 40–150 kV in this study. These include the mass attenuation coefficient (MAC), linear attenuation coefficient (LAC), half-value layer (HVL), tenth-value layer (TVL), and mean free path (MFP). The ability of any ceramic sample under investigation to shield radiation at low X-ray energy is indicated by the theoretical and experimental values of LAC. The potential applications of these easily accessible, reasonably priced ceramic materials for radiation protection in X-ray labs and low-energy X-ray shielding in a variety of fields have been shown by this investigation.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438366","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

Time-dependent relaxation dynamics of remanent strain in textured PMN–PZ–PT and PMN–PIN–PT piezoceramics 纹理 PMN-PZ-PT 和 PMN-PIN-PT 压电陶瓷中随时间变化的残余应变弛豫动力学

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2024-10-10 DOI: 10.1016/j.rinp.2024.108007

{"title":"Time-dependent relaxation dynamics of remanent strain in textured PMN–PZ–PT and PMN–PIN–PT piezoceramics","authors":"","doi":"10.1016/j.rinp.2024.108007","DOIUrl":"10.1016/j.rinp.2024.108007","url":null,"abstract":"<div><div>Crystallographically textured lead-based piezoceramics, particularly Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–PbZrO<sub>3</sub>–PbTiO<sub>3</sub> (PMN–PZ–PT) and Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–Pb(In<sub>1/2</sub>Nb<sub>1/2</sub>)O<sub>3</sub>–PbTiO<sub>3</sub> (PMN–PIN–PT), play a pivotal role in electromechanical applications due to their enhanced field-induced strain responses. However, challenges in precision positioning arise from heightened remanent strain (S<sub>r</sub>) caused by embedded templates in the textured grains, impacting strain cycle consistency due to increased time delay for S<sub>r</sub> relaxation. This study investigates the time-dependent relaxation dynamics of S<sub>r</sub> in textured PMN–PZ–PT and PMN–PIN–PT piezoceramics, focusing on experimentally determining relaxation time between cycles required for complete S<sub>r</sub> relaxation. Our findings reveal that the relaxation time in textured piezoceramics is notably longer than that in their non-textured counterparts, primarily due to pinning of domain walls by embedded templates. This work provides insights into the strain relaxation characteristics of piezoceramics and underscores the importance of time delay in designing precision positioning systems for improved reliability.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434413","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

Unfolding magnetic, electrical and universal magneto-resistance scaling behavior of Ni2Mn1−xCoxIn Ni2Mn1-xCoxIn 的展开磁性、电性和通用磁阻缩放行为

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2024-10-10 DOI: 10.1016/j.rinp.2024.108010

{"title":"Unfolding magnetic, electrical and universal magneto-resistance scaling behavior of Ni2Mn1−xCoxIn","authors":"","doi":"10.1016/j.rinp.2024.108010","DOIUrl":"10.1016/j.rinp.2024.108010","url":null,"abstract":"<div><div>We uncover the magnetic, electrical transport properties and universal magneto-resistance scaling nature of cubic Ni<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Mn<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub></math></span>Co<span><math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math></span>In with nominal compositions of <em>x</em> = 0.05 and 0.1. Positive Weiss temperature, magnetic saturation in relatively low fields, non-hysteretic and non-coercive signatures confirm soft-ferromagnetic behavior of the alloys. Formation of random ferromagnetic clusters in the paramagnetic state for <em>x</em> = 0.1 is noticed through Griffith’s phase signatures in inverse susceptibility. Rhodes–Wohlfarth analysis confirms the itinerant magnetic nature. These alloys exhibit metallic character with Fermi liquid behavior at low temperatures. Relatively smaller negative magneto-resistance indicates the suppression of itinerant spin fluctuations and incoherent scattering of conduction electrons. Second order magnetic phase transition is inferred from a well-scaled normalized magneto-resistance independent of magnetic field strength. Our study stimulates interest to unravel the ground state physical and magnetic properties of substituted (non-magnetic/magnetic for Mn Ni and In) soft-ferromagnetic Ni<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>MnIn.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434427","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

Study the electronic, optical, and thermoelectric characteristics of cubic perovskite BXO3 (X = P, As, Sb, Bi): DFT calculations 研究立方包晶 BXO3（X = P、As、Sb、Bi）的电子、光学和热电特性：DFT 计算

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2024-10-10 DOI: 10.1016/j.rinp.2024.108005

{"title":"Study the electronic, optical, and thermoelectric characteristics of cubic perovskite BXO3 (X = P, As, Sb, Bi): DFT calculations","authors":"","doi":"10.1016/j.rinp.2024.108005","DOIUrl":"10.1016/j.rinp.2024.108005","url":null,"abstract":"<div><div>The structural, electronics, optical, and thermoelectric characteristics of BXO<sub>3</sub>(X = P, As, Sb, and Bi) perovskites are investigated within the density functional theory (DFT) framework. The full potential linearized augmented plane wave method employs various exchange–correlation potential approximations to estimate the ground state’s physical properties. The ground state stability of BXO<sub>3</sub> perovskites was examined and all compounds have shown their cubic structure stability. The computed ground state structural parameters in the stability phase agree well with the available literature. Our results of optical properties indicated the potential use of BXO<sub>3</sub>(X = P, As, Sb, and Bi) in visible and ultraviolet zones of optoelectronic devices. The studied perovskites have indirect bandgap energy except BSbO<sub>3</sub> has a direct bandgap. Notably, our findings show that except for BPO<sub>3</sub> the figure of merit (ZT) values approach unity within the temperature range of 100–800 K for BSbO<sub>3</sub> and BBiO<sub>3</sub>. In contrast, for BAsO<sub>3</sub> the value decreases rapidly from one after 300 K. These perovskites are prospective candidates for thermoelectric applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416352","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

Tunable graphene plasmonic metadevice for infrared polarization resolved spectroscopy detection 用于红外偏振分辨光谱检测的可调谐石墨烯等离子元器件

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2024-10-04 DOI: 10.1016/j.rinp.2024.108002

{"title":"Tunable graphene plasmonic metadevice for infrared polarization resolved spectroscopy detection","authors":"","doi":"10.1016/j.rinp.2024.108002","DOIUrl":"10.1016/j.rinp.2024.108002","url":null,"abstract":"<div><div>Polarization-resolved spectroscopy imaging holds significant promise in various fields. However, conventional polarization-resolved spectroscopy imaging systems often reply on separate dispersion elements, polarization splitting components, and mechanical scanning or rotating structures, resulting in bulky systems with intricate designs. The pursuit of lightweight and seamlessly integrated polarization spectroscopy imaging systems presents a critical challenge. Here, we propose an integrated polarization spectroscopy detector operating in the mid-infrared range based on a tunable graphene metasurface. Within the graphene metasurface, plasmonic resonances of graphene are excited by a gold nano-grating, allowing simultaneous modulation of spectral and polarization transmission characteristics for infrared light by tuning the Fermi energy of graphene. With the help of neural network based recovery algorithms, this system achieves pixel-level spectral detection (with a resolution below 200 nm), multi-color polarization Stokes vector analysis (with a monochromatic angular error of less than 0.1 rad), and concurrent polarization and spectroscopy detection. This research paves the way for the development of the next generation integrated infrared polarization resolved spectroscopy imaging systems.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416354","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

Measurement of turbid media by total internal reflection with Goos-Hänchen angle displacement 利用 Goos-Hänchen 角位移全内反射测量浑浊介质

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2024-10-03 DOI: 10.1016/j.rinp.2024.107997

引用次数: 0

Self-induced Bose glass phase in quantum quasicrystals 量子准晶体中的自诱导玻色玻璃相

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2024-10-01 DOI: 10.1016/j.rinp.2024.107991

引用次数: 0