物理最新文献

{"title":"Effect of Si and Ge addition on strain properties of FeNiMn thin-film alloy prepared by the magnetron co-sputtering","authors":"O. V. Pylypenko,&nbsp;S. I. Vorobiov,&nbsp;O. I. Hunbin,&nbsp;Iu. Iu. Volk,&nbsp;K. V. Tyschenko,&nbsp;V. Komanicky,&nbsp;Yu. O. Shkurdoda,&nbsp;I. M. Pazukha","doi":"10.1007/s00339-026-10364-0","DOIUrl":"10.1007/s00339-026-10364-0","url":null,"abstract":"<div><p>FeNiMn and FeNiMnSiGe thin-film alloys were prepared by magnetron co-sputtering under identical technological conditions in order to establish how the addition of the metalloids Si and Ge affects their microstructure, surface morphology, and strain-gauge properties. TEM, SAED, XRD, and AFM were used to analyze crystal structure and surface morphology. Electromechanical testing over the strain ranges ε_<i>l</i>1 = 0–1% and ε_<i>l</i>2 = 0–2% reveals that Si and Ge suppress the mechanical hysteresis and the baseline resistance drift typical of the base ternary FeNiMn thin-film alloy and extends the highly reversible electromechanical response up to 2% strain, while the gauge factor decreases from 7.68 to 1.25 and from 13.75 to 2.50 for the two ranges, respectively. Cyclic loading at 100 °C causes a temporary resistance drift during the first cycle but may be related to partial relaxation of residual growth stresses: after cooling to room temperature, the Fe₂₂Ni₂₀Mn₂₂Si₁₅Ge₂₁ film exhibits a closed hysteresis loop, a strictly linear response, and stable gauge factors of 1.33 and 1.47 with negligible baseline drift. The combination of linearity, cyclic stability, and thermal endurance makes highly doped FeNiMnSiGe films promising sensitive elements for precision strain sensors.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"132 11","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elastic and magnetoelastic constants of Y3-xFe5+xO12 garnets: polycrystalline-to-single crystalline approximations","authors":"D. J. Parekh,&nbsp;P. U. Sharma,&nbsp;S. P. Kanabar,&nbsp;N. S. Kanani,&nbsp;N. H. Vasoya,&nbsp;K. B. Modi","doi":"10.1140/epjb/s10051-026-01253-9","DOIUrl":"10.1140/epjb/s10051-026-01253-9","url":null,"abstract":"<div><p>The growth and characterization of single crystalline materials require considerable experimental expertise and cumbersome evaluation. Estimating the physical properties of single crystals from their polycrystalline counterparts is a topic of considerable scientific interest. A close agreement between elastic theory-derived zero-porosity-corrected values of longitudinal (<i>L</i>₀) and rigidity modulus (<i>G</i>₀) for polycrystalline Y₃Fe₅O₁₂ and longitudinal (<i>C</i>₁₁) and shear (<i>C</i>₄₄) stiffness constants for single crystalline equivalent has been found. This prompted the approximation of elastic, magnetoelastic, and magnetostriction constants for single crystalline analogs of the garnet series Y_3-<i>x</i>Fe_5+<i>x</i>O₁₂, with <i>x</i> = 0.0, 0.1, 0.3, and 0.5. The elastic stiffness constants (<i>C</i>₁₁, <i>C</i>₁₂, and <i>C</i>₄₄), magnetoelastic coupling constants (<i>b</i>₁ and <i>b</i>₂), and interatomic force constant (<i>f</i>) are found to decrease. The elastic compliance constants (<i>S</i>₁₁, <i>S</i>₁₂, and <i>S</i>₄₄) are found to increase while magnetostriction constants (λ₁₀₀, λ₁₁₁, λ₁₁₀) and λ_<i>S</i> show random variations with Fe³⁺ substitution. The Cauchy pressure (<i>P</i>_<i>c</i>) monotonically increases for <i>x</i> = 0.1–0.5 compositions. The results have been explained based on the large size and magnetic moment mismatch of Y³⁺ (0.89 Å, 0 μ_B)- and Fe³⁺ (0.645 Å, 5 μ_B)-induced structural and electronic distortions, lattice strain, and antisite disorder. In addition to qualitative analysis, quantitative analysis to explain the variation of λ₁₁₁ and <i>f</i> versus <i>x</i> has been given.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"99 10","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189073","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}

{"title":"Comparison of laser ablation in the sub-picosecond and nanosecond regimes with MHz repetition rate at 515 nm and application to graphite","authors":"V. Sanchez,&nbsp;C. E. Cifuentes Quintal,&nbsp;T. Doualle,&nbsp;Y. Pontillon,&nbsp;L. Gallais","doi":"10.1007/s00339-026-10325-7","DOIUrl":"10.1007/s00339-026-10325-7","url":null,"abstract":"<div><p>Micro-machining with ultra-short (sub-ps) and short (ns) pulsed lasers is used to minimize thermal effects, as the heat-affected zone depends on pulse duration. The distinction between ’cold’ (ultra-short regime) and ’hot’ (short regime) ablation holds for single-shot processes, but for high-repetition-rates, it involves additional effects such as incubation, plasma shielding, and thermal accumulation, making the choice of optimal pulse duration more complex. This study compares laser cutting and engraving using sub-picosecond and nanosecond lasers at the same repetition rate of 0.5 MHz. Experiments on graphite determined ablation properties and optimal processing parameters. A thermal model was used to understand the heat accumulation resulting in incubation phenomenon and allows us to characterize the heat affected zone for a given process. Results highlight the influence of pulse duration and process parameters on efficiency and thermal effects, offering insight for high-repetition rates laser processing of sensitive materials.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"132 11","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical design and 1D-CNN surrogate modeling of a tunable Graphene/Au/MXene/WS₂/Cu terahertz metasurface for high-sensitivity RI-based glucose sensing","authors":"M. Chairman,&nbsp;S. Gopinath","doi":"10.1007/s00339-026-10336-4","DOIUrl":"10.1007/s00339-026-10336-4","url":null,"abstract":"<div><p>Reliable, non-invasive glucose monitoring remains essential for improving diabetes management, motivating the development of highly sensitive terahertz (THz) biosensors. This study proposes a hybrid Graphene/Au/MXene/Cu metasurface biosensor on a SiO₂ substrate featuring a central copper rectangular resonator, MXene–WS₂-coated V-shaped resonators, concentric gold rings, and a graphene layer to enhance plasmonic field confinement. Full-wave COMSOL simulations and parametric optimization investigated graphene chemical potential (0.1–0.9 eV), incidence angle (0°–80°), and resonator dimensions across four structural configurations. The optimized design achieved a maximum local sensitivity of 1000 GHz/RIU over a glucose refractive index range of 1.335–1.338, with a figure of merit of 10.753 RIU⁻¹ and a quality factor of 4.250 at 0.391 THz. Electric field enhancement reached 9.15 × 10⁷ V/m, while a 1D-CNN surrogate model predicted sensor responses with R² &gt; 0.9992 and MAPE &lt; 0.18%. These numerical findings establish a computationally efficient platform with potential for rapid, label-free THz glucose sensing and provide a basis for subsequent experimental validation.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"132 11","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ising diatomic molecules in the mean-field and exact recursion relations approach","authors":"Erhan Albayrak","doi":"10.1140/epjb/s10051-026-01291-3","DOIUrl":"10.1140/epjb/s10051-026-01291-3","url":null,"abstract":"<p>This research utilizes a mean field theory (MFT) on spin-1/2 diatomic molecules for the first time to obtain the thermal changes in magnetizations for each molecule, thus generating the phase diagrams. The same model was also studied using the Bethe lattice (BL) approach in terms of the exact recursion relations (ERR) in order to compare its results with the MFT results. Different types of bilinear interaction parameters between the constituents of a molecule and nearest-neighbor (NN) molecules were assumed, and the coordination number is set to three, corresponding to the honeycomb lattice. It is found that the MFT only gives second-order phase transitions, but the ERR approach gives various phase transitions. The obtained results show that the ERR approach on the BL is superior over the MFT since it provides many more details of the model.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"99 10","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189074","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}

{"title":"Structural, dielectric, electrical, and electronic-structure properties of Dy₀.₅Ba₀.₅CrO₃ perovskite","authors":"Ghada Raddaoui,&nbsp;Karim Souifi,&nbsp;Abdullah Saad Alsubaie,&nbsp;Khasan Berdimuradov,&nbsp;Elyor Berdimurodov,&nbsp;Mansur Radjabov,&nbsp;Okhunjon Khasanov","doi":"10.1007/s00339-026-10331-9","DOIUrl":"10.1007/s00339-026-10331-9","url":null,"abstract":"<div><p>Dy₀.₅Ba₀.₅CrO₃ was synthesized using a citrate-based sol–gel method and investigated through structural, microstructural, dielectric, impedance, electrical-transport, and electronic-structure analyses. X-ray diffraction and Rietveld refinement indicated the formation of a predominantly single-phase orthorhombic perovskite structure with Pnma symmetry. The refinement produced (R_p = 4.2%, R_wp = 5.6%, χ² = 2.17), and a goodness-of-fit value of 1.47. Williamson–Hall analysis gave an average crystallite size of approximately 44 nm and a microstrain of. The conductivity increased with temperature, confirming thermally activated semiconducting behavior. Activation energies of approximately eV for DC transport and eV for relaxation were obtained from Arrhenius analysis. The frequency-dependent conductivity followed Jonscher’s universal power law, while the impedance response exhibited thermally activated non-Debye relaxation and a decreasing overall resistance with increasing temperature. Because no equivalent-circuit fitting was performed, separate grain and grain-boundary parameters were not extracted. Oxygen-related defects and chromium mixed valence are discussed as possible contributors to localized transport but are not considered conclusively established without complementary bulk oxygen-stoichiometry measurements.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"132 11","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aliovalent Al³⁺ substitution-induced enhancement of Mg²⁺ ionic conductivity in NASICON-type Mg0.5Ti2(PO4)3 solid electrolytes","authors":"N. A. Wahab,&nbsp;M. H. Shehri,&nbsp;S. B. R. S. Adnan,&nbsp;S. Rudhziah,&nbsp;N. A. Dzulkurnain,&nbsp;N. A. Mustaffa","doi":"10.1007/s00339-026-10269-y","DOIUrl":"10.1007/s00339-026-10269-y","url":null,"abstract":"<div><p>The Mg₀.₅₊₀.₅ₓAlₓTi₂₋ₓ(PO₄)₃ samples (<i>x</i> = 0.1, 0.3, 0.5, 0.7 and 0.9) were investigated to evaluate the effect of Al³⁺ substitution on the structural and ionic transport properties of Mg₀.₅Ti₂(PO₄)₃. XRD results confirmed that the samples predominantly exhibited a rhombohedral R-3c crystal structure similar to that of the parent compound. The Al³⁺ substitution for Ti⁴⁺ is proposed to promote charge compensation, which may facilitate the incorporation of additional Mg²⁺ ions and consequently enhance ionic transport. Among the investigated compositions, <i>x</i> = 0.5 (AL5) exhibited the highest ionic conductivity, reaching 2.61 × 10⁻⁸ S cm⁻¹ at room temperature and 5.41 × 10⁻⁶ S cm⁻¹ at 500 °C. The enhancement in conductivity is consistent with the proposed charge-compensation mechanism, although direct confirmation of interstitial Mg²⁺ occupancy requires further structural characterization. The frequency-dependent conductivity and temperature dependence of the frequency exponent further indicate thermally activated ionic transport in AL5. The Arrhenius analysis of total ionic conductivity yielded apparent activation energies of 0.04 eV and 0.62 eV for the low and high temperature regions, respectively. These findings demonstrate that Al substitution can effectively enhance the ionic transport properties of Mg₀.₅Ti₂(PO₄)₃ and provide useful insight into the development of NASICON-type magnesium-ion solid electrolytes.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"132 11","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prospects for early heavy-quark measurements at the EIC","authors":"Allencris John Rubesh Rajan,&nbsp;Laboni Manna","doi":"10.1140/epja/s10050-026-01974-6","DOIUrl":"10.1140/epja/s10050-026-01974-6","url":null,"abstract":"<div><p>We assess the prospects for inclusive heavy-quark-pair electroproduction in electron–proton (<i>ep</i>) and electron–nucleus (<i>e</i>A) collisions, alongside double-charm-pair (<span>(D^0 bar{D}^0)</span> and <span>(D^0D^0)</span>) electroproduction in <i>ep</i> collisions, during the early operational phase of the Electron-Ion Collider (EIC). Based on the anticipated beam energies and luminosities of the EIC, we estimate the total cross sections and differential distributions for photon virtuality <span>(Q^2)</span>, heavy-quark transverse momentum, and rapidity. This analysis evaluates different Bjorken-<i>x</i> (<span>(x_textrm{Bj})</span>) intervals across a range of <span>(Q^2)</span> values. Expected event yields are estimated from the projected integrated luminosities of the early science programme, demonstrating the substantial improvement in statistical precision over previous HERA measurements at moderate and large <span>(x_{textrm{Bj}})</span>. For electron–nucleus collisions, we compute the nuclear modification ratio <span>(R^{etext {A}})</span> within collinear factorisation using nuclear parton distribution functions, and identify the kinematic regimes in which shadowing, anti-shadowing, and EMC-like suppression are accessible with early EIC data. These results are intended to serve as a parton-level baseline to support feasibility studies and to provide a reference for future higher-order theoretical and experimental investigations at the EIC.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 10","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-026-01974-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"25th EPJE anniversary: vision piece on EPJE role today and tomorrow","authors":"Fabrizio Croccolo,&nbsp;Giovanna Fragneto,&nbsp;Holger Stark","doi":"10.1140/epje/s10189-026-00630-7","DOIUrl":"10.1140/epje/s10189-026-00630-7","url":null,"abstract":"<p>On the occasion of the 25th anniversary of The European Physical Journal E—Soft Matter and Biological Physics, we reflect on the journal’s origins, rooted in Pierre-Gilles de Gennes’ vision of soft matter as a unifying field of physics, and trace its evolution to encompass biological and active systems. We review EPJE’s current position as a journal combining strong European roots with global reach, publishing original research, topical issues, reviews, and experimentally focused Tips and Tricks papers. Looking ahead, we outline our vision: deepening coverage of non-equilibrium and active matter, expanding into functional soft materials, reinforcing our strength in rheology, prioritizing experimental innovation, and embracing sustainability-related research, while remaining committed to Open Access and to bridging generations of scientists in the field.</p>","PeriodicalId":790,"journal":{"name":"The European Physical Journal E","volume":"49 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189449","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}

{"title":"In-plane magnetic field dependent energy spectrum of isolated GaAs-AlGaAs quantum well: numerical calculation","authors":"Shahajan Miah,&nbsp;Nujhat Nuri Sultana,&nbsp;Sujaul Chowdhury","doi":"10.1007/s00339-026-10279-w","DOIUrl":"10.1007/s00339-026-10279-w","url":null,"abstract":"<div><p>We have numerically calculated energy spectrum of electron in isolated GaAs-AlGaAs Quantum Well in conduction band in presence of uniform static magnetic field applied parallel to GaAs-AlGaAs interfaces. We have numerically solved eigenvalue equation of energy using a two-point boundary value problem in this regard. This is the first use of the numerical method to this classic problem of nanostructure physics. There is no need to use any analytical expression for eigenfunctions in the calculations. We have also shown that results of our method agree very well with known standard results where available; we analyzed two different cases in this regard. Thus the work introduces a novel numerical approach in computational nanostructure physics.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"132 11","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}