A multi-resolution hybrid Haar wavelet collocation method for solving nonlinear partial differential equations Amina Iqbal, Shazia Javed, Sidra Saleem, Mohammad Nasir, Nazir Ahmad Choudhry, Dalia H. Elkamchouchi, Umid Turdialiyev, M.Ijaz Khan Ain Shams Engineering Journal, 2026 This study focuses on approximation of several types of partial differential equations with different orders (including diffusion equation, Fisher equation, Atangana-Baleanu Burger’s equation and Korteweg-de Vries (KdV) equation). A multi-resolution (MR) based hybrid Haar wavelet collocation method (hHWCM) is proposed to approximate the exact solutions of discussed equations. The proposed method (hHWCM) is constructed on the basis of Euler’s formula (finite difference method (FDM)) and collocation procedure of Haar wavelet (HW) having multi-resolution characteristics. The algorithm of hHWCM is formulated using MATLAB coding. The nonlinear PDEs are linearized using Quasi Newton’s Technique [1] , whereas time discretization is performed using FDM and space discretization is obtained by HWCM. A comparative analysis between exact and approximate solutions is attained and stability of the proposed method is discussed. Moreover, the maximum absolute errors (MAEs) and experimental rate of convergence (ERoC) are calculated. The evaluations are displayed by means of figures and tables that indicate a good compatibility between the two solutions.
Multiscale magnetic correlations in La2Mn2-xNixO6: Role of crystal structure in double perovskites A. K. Bera, K. S. Chikara, B. Saha, S. M. Yusuf, Mohd. Nasir, S. Sen Physical Review B, 2026 The magnetic correlations in double perovskites $\mathrm{L}{\mathrm{a}}_{2}\mathrm{M}{\mathrm{n}}_{2\ensuremath{-}x}\mathrm{N}{\mathrm{i}}_{x}{\mathrm{O}}_{6}$ ($x=0.5$, 0.75, 1.0, 1.25, and 1.5) have been systematically investigated across macroscopic, mesoscopic, and microscopic length scales using temperature-dependent bulk DC magnetization, neutron depolarization, and neutron powder diffraction measurements, respectively. The magnetic properties evolve from a long-range ferromagnetic (FM) order to a cluster ferromagnetic/spin-glass (FM/SG) behavior as the Ni concentration increases. This evolution is directly linked to changes in the crystal structure, transitioning from pure orthorhombic ($x=0.5$) to mixed orthorhombic and monoclinic ($x=0.75\ensuremath{-}1.0$), and eventually to mixed trigonal and monoclinic ($x=1.25\ensuremath{-}1.5$) symmetries. Ni substitution enhances the magnetic ordering temperature from 170 K ($x=0.5$) to 280 K ($x=1.0$), but this is accompanied by a reduction in both magnetization and ordered magnetic moment. Beyond $x=1.0$, any long-range magnetic ordering is absent. Additionally, all compositions exhibit a reentrant spin-glass-like phase at low temperatures (below $\ensuremath{\sim}50$ K). Neutron diffraction analysis confirms that long-range FM order occurs only in the orthorhombic phase, while the monoclinic and trigonal phases lack such magnetic ordering. The temperature-dependent magnetic correlations are closely connected to variations in crystal structural parameters, including lattice constants and unit-cell volume. The electrical conductivity behavior, following the variable range hopping (VRH) model, highlights the role of multivalent Mn and Ni ions on the electrical properties. This study elucidates the microscopic mechanisms behind the tunable magnetic and electrical properties of $\mathrm{L}{\mathrm{a}}_{2}\mathrm{M}{\mathrm{n}}_{2\ensuremath{-}x}\mathrm{N}{\mathrm{i}}_{x}{\mathrm{O}}_{6}$, offering valuable insights for the design of advanced materials for spintronic applications.
Temperature-dependent thermoelectric transport in Ag-doped Tl₈.₃₃Sb₁.₆₇Te₆ nanoparticles Muhammad Tufail, Wiqar H. Shah, Mohammad Nasir, Mawaheb Al-Dossari, Wissal Jilani, Abdul Hakim Shah, Shakir Ullah, Muhammad Farhat Ullah, Umid Turdialiyev, M. Ijaz Khan Materials Today Communications, 2026 In the present study, we examine how Ag doping affects the electrical and thermal characteristics of Tl 8.33 Sb 1.67-x Ag x Te 6 (1.29 ≤ x ≤ 1.38) Chalcogenide nanoparticles, which are made by ball milling and solid-state processes in sealed silica tubes. The x-ray diffraction verified that all of these compounds were phase pure structurally. Four probe resistivity techniques were used to examine the electrical conductivity, and the results showed that the electrical conductivity drops with temperature. Because of the enhanced Umklapp phonon scattering, the thermal conductivity of nano compounds was estimated as well from a temperature range of 305K–550 K. An increase in temperature decreases the thermal conductivity. The Seebeck coefficient (S), which was calculated for every substance under study, increased steadily as the temperature increased from 305 K to 550 K. S stayed positive over the whole temperature spectrum, indicating that the substances were p-type semiconducting. Improved power factor and dimensionless figure of merit (ZT) values were a result of the temperature-dependent increase in S. The composition with x = 1.29 in particular showed a ZT of 0.58 at 305 K, which progressively rose to 0.84 at 500 K. Furthermore, ZT value also rises as doping concentration does as well; at 410 K the sample Tl 8.33 Sb 0.29 Ag 1.38 Te 6 exhibits the greatest value of 1.31in all the others samples. The development of high-performance flexible TE devices based on ductile TE materials would be guided by the results of this investigation. • Ag doping optimizes electrical and thermal behavior. • XRD confirms phase-pure chalcogenide nanoparticle structure. • Electrical conductivity decreases with increasing temperature. • Seebeck coefficient rises, confirming p-type semiconductivity. • Maximum ZT of 1.31 achieved at 410 K.
Influence of non-thermal electrons and non-extensive positrons on ion acoustic solitary waves in multi-component plasmas Mohammad Nasir, Labiba Ameen, Bushra Asghar, Aqsa rani, N. Beemkumar, Vatsal Jain, Sana Imtiaz, Muhammad Farhat Ullah, Hala A. Hejazi, Najla A. Mohammed, M. Ijaz Khan International Communications in Heat and Mass Transfer, 2026 Ion acoustic solitary waves (IASWs) are important for transferring energy and information in both laboratory and in space plasma systems. Though several studies have focused on plasmas with standard Maxwellian electrons and positrons, real plasma settings like those in astrophysics, pulsar magnetospheres and laboratory experiments often have more complex structures such as non-thermal electron distributions and non-extensive positron populations. Despite their implication, the combined influence of these two non-equilibrium features on ion acoustic solitary waves has not yet been carefully explored. This work investigates the plasma system that comprises both non-thermal electrons and non-extensive positrons at the same time, which hasn't been considered together before. Using the Sagdeev potential approach an energy integral equation is derived that helps us to examine the energy of ion acoustic solitons. The important impact of plasma aspects on Ion acoustic (IA) solitary wave structures, including non-thermality parameter, positron concentration, non-extensive positron effect, concentration of cold ion and temperature ratio of positron to electron are investigated in detail. Then, we carefully explore how these two unique features influence key properties like the solitons' amplitude, width, speed and energy. This combined approach gives us significant insights that previous studies did not reveal, which focused on only one type of non-equilibrium particle. Our results reveals that non-thermality of electrons and non-extensivity of positrons significantly modify the soliton features, signifying possible explanations for observed nonlinear structures in space plasma observations and guiding laboratory plasma experiments.
Nonlinear ion acoustic solitary waves in nonplanar geometry with nonthermal electrons and nonextensive positrons Mohammad Nasir, Ali B.M. Ali, Aieza Khan, Ayesha Noureen, Naiz Wali, Muhammad Farhat Ullah, Muhammad Nouman Khan, F.F. Al-Harbi, Eldor Abdurakhmonov, M. Ijaz Khan International Communications in Heat and Mass Transfer, 2026 The nonlinear dynamics of ion acoustic solitary waves (IASWs) in nonplanar geometry are examined in a plasma comprising of adiabatic ions, nonthermal electrons (Cairns distribution), and nonextensive positrons (Tsallis statistics). To examine the deviations from planar wave characteristics. Both cylindrical and spherical geometries are studied. Using the reductive perturbation technique, a modified nonplanar Korteweg–de Vries–Bergers (KdVB) equation is obtained. The effects of positron nonextensivity, electron nonthermality, positron concentration, and temperature ratios on IASW properties are analytically studied. Results demonstrate that nonextensive and nonthermal structures strongly modify wave amplitude, width, and stability, while nonplanar geometry presents additional dispersive effects that can either increase or suppress localization. Both compressive and rarefactive solitons are originate, depending on plasma circumstances. This investigation offers new insights into solitary wave behavior in astrophysical and laboratory plasmas considered by nonthermal and nonextensive particle distributions.
Stabilizing the Solid Electrolyte Interphase with Phenyl Isothiocyanate for Long-Cycle Lithium Metal Batteries Bushra Khan, Mohammad Nasir, Jae‐won Lee, Hee Jung Park Batteries and Supercaps, 2025 Lithium metal batteries possess great potential for portable electronic devices as a next‐generation secondary battery owing to their high specific capacity and energy density. However, their cycling stability is hindered by the formation of an unstable solid‐electrolyte interphase between the electrolyte and the Li anode, leading to poor cycling performance. Herein, phenyl isothiocyanate (PITC) has been introduced as an additive in a propylene carbonate (PC) electrolyte to stabilize the solid‐electrolyte interphase layer on the Li metal anode. The addition of PITC significantly improves the electrochemical performance of Li||Cu half‐cells, exhibiting a coulombic efficiency of 82%, and enhances cycling stability in Li||Li symmetric cells, with low polarization and a uniform solid‐electrolyte interface, as confirmed by scanning electron microscopy (SEM) analysis. In Li||LFP full cells, the optimized electrolyte demonstrated excellent cycling stability, maintaining a discharge capacity of 150 mAh g−1 after 650 cycles at a 1C rate. These results verify that PITC is an effective additive for PC‐based electrolytes, enhancing the longevity and stability of lithium metal batteries.
Influence of Cation Order and Valence States on Magnetic Ordering in La2Ni1−xMn1+xO6 Mohd. Nasir, Mahmud Khan, Subhash Bhatt, Anup Kumar Bera, Mohammad Furquan, Sunil Kumar, Sk. Mohammad Yusuf, Nirmalendu Patra, Dibyendu Bhattacharya, Shambhu Nath Jha, Shun‐Wei Liu, Sajal Biring, Somaditya Sen Physica Status Solidi B Basic Research, 2019
Cu1-xFexO: Hopping transport and ferromagnetism Mohd. Nasir, Rakibul Islam, Md. A Ahmed, Saniya Ayaz, Gautham Kumar, Sunil Kumar, C. L. Prajapat, Frederick Roussel, Sajal Biring, Somaditya Sen Royal Society Open Science, 2017
Multiscale magnetic correlations in : Role of crystal structure in double perovskites AK Bera, KS Chikara, B Saha, SM Yusuf, M Nasir, S Sen Physical Review B 112 (13), 134455 , 2025 2025
Excess-Lithium-Free LLZO Enabling Fast Ion Conduction and Ultra-Low Interfacial Resistance for Solid-State Lithium Metal Batteries M Nasir, J Seo, JI Song, YS Choi, HJ Park Energy Storage Materials, 104482 , 2025 2025 Citations: 3
Ultrastable Cycling in Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 -Based Solid Electrolytes via Pt-Engineered Interfaces SI Jung, M Nasir, HJ Park ACS Applied Energy Materials , 2025 2025 Citations: 3
Stabilizing the Solid Electrolyte Interphase with Phenyl Isothiocyanate for Long‐Cycle Lithium Metal Batteries B Khan, M Nasir, J Lee, HJ Park Batteries & Supercaps, e202500227 , 2025 2025
Lithium-Optimized Ga-Doped Li7La3Zr2O12 with Enhanced Conductivity and Interface Stability for Solid-State Lithium Batteries M Nasir, J Seo, HJ Park 247th ECS Meeting (May 18-22, 2025) , 2025 2025
Layered Two-Dimensional TiO 2 -PEO Composite Solid Electrolyte with High Lithium-Ion Conductivity for All-Solid-State Lithium Batteries J Seo, M Nasir, HJ Park 247th ECS Meeting (May 18-22, 2025) , 2025 2025
Lithium-Ion Conduction Pathways in LLZO-PEO Composite Solid Electrolytes J Seo, M Nasir, HJ Park ACS Applied Energy Materials 8 (3), 1518–1525 , 2025 2025 Citations: 19
Calcination-Driven Enhancement of LAGP for High-Performance Solid-State Lithium Metal Batteries SI Jung+, M Nasir+, HJ Park Journal of Materials Chemistry A 13 (6), 4624-4633 , 2025 2025 Citations: 9
Liquid Electrolyte-Assisted Stabilization of the LLZO/Li Interface for Stable Lithium Metal Batteries M Nasir, J Seo, SI Jung, HJ Park EES Batteries , 2025 2025 Citations: 3
Engineering Current Collector with 2D TiO2 Nanosheets for Stable Lithium Metal Batteries JS Park, M Nasir, D Kim, HM Jeong, HJ Park Batteries & Supercaps, e202400741 , 2025 2025 Citations: 1
Excellent electrochemical response of Ce stabilized cubic Li7La3Zr2O12 M Nasir, J Seo, JS Park, HJ Park Journal of the European Ceramic Society 44 (7), 4606-4611 , 2024 2024 Citations: 14
Investigating the Effect of Co-doping on Structural and Electrical Properties of Li7La3Zr2O12 Solid Electrolyte HJP Mohammad Nasir, Jun Seo, Jun Seo Park, Seo In Jung, Hee Jin Kim Ceramist 27 (1), 1-8 , 2024 2024 Citations: 6
Li‐La‐Zr‐O Garnets with High Li‐Ion Conductivity and Air‐Stability by Microstructure‐Engineering (Adv. Funct. Mater. 35/2023) M Nasir, JY Park, P Heo, KH Choi, HJ Park Advanced Functional Materials 33 (35), 2370208 , 2023 2023
Li‐La‐Zr‐O Garnets with High Li‐Ion Conductivity and Air‐Stability by Microstructure‐Engineering M Nasir, JY Park, P Heo, KH Choi, HJ Park Advanced Functional Materials 33 (35), 2303397 , 2023 2023 Citations: 55
Exploring complex magnetic behavior induced by Mn in LaNiO 3 perovskite A Ahmed, M Nasir, HJ Park, M Furquan, M Hashim, BS Choi Applied Physics A 129 (8), 581 , 2023 2023 Citations: 9
Synthesis of ultra-thin nanobelt-like vanadium-oxide and its abnormal optical-electrical properties HJ Park, JM Lee, M Nasir, SJ Yoo, CJ Choi, K Lee Ceramics International 49 (4), 6419-6428 , 2023 2023 Citations: 2
Study on the decisive factor for metal–insulator transitions in a LaVO 3 Mott–Hubbard insulator M Nasir, I Kim, K Lee, S Kim, KH Lee, HJ Park Physical Chemistry Chemical Physics 25 (5), 3942-3949 , 2023 2023 Citations: 5
Anomalous Optoelectric Properties of an Ultrathin Ruthenium Film with a Surface Oxide Layer for Flexible Transparent Conducting Electrodes JM Oh+, M Nasir+, B Ryu, HJ Yun, CJ Choi, JS Bae, HJ Park Advanced Functional Materials 32 (14), 2109330 , 2022 2022 Citations: 14
Enhanced B-site cation ordering and improved magnetic properties: Role of A-site Bi substitution in La2NiMnO6 double perovskites M Nasir, AK Pathak, J Kubik, D Malaviya, V Krupa, A Dasgupta, S Sen Journal of Alloys and Compounds 896, 162713 , 2022 2022 Citations: 19
Improved Room-Temperature Ferromagnetism in Nd-Doped SnO 2 Nanostructures through Defect Engineering A Ahmed, M Nasir, M Hashim, P Tripathi, BS Choi The Journal of Physical Chemistry C 125 (40), 22175-22187 , 2021 2021 Citations: 22
MOST CITED SCHOLAR PUBLICATIONS
Role of Antisite Disorder, Rare-Earth Size, and Superexchange Angle on Band Gap, Curie Temperature, and Magnetization of R 2 NiMnO 6 Double Perovskites M Nasir, S Kumar, N Patra, D Bhattacharya, SN Jha, DR Basaula, S Bhatt, ... ACS Applied Electronic Materials 1 (1), 141-153 , 2019 2019 Citations: 157
Influence of samarium doping on structural, elastic, magnetic, dielectric, and electrical properties of nanocrystalline cobalt ferrite M Hashim, N Boda, A Ahmed, SK Sharma, D Ravinder, E Sumalatha, ... Applied Physics A 127 (7), 526 , 2021 2021 Citations: 75
The effect of high temperature annealing on the antisite defects in ferromagnetic La2NiMnO6 double perovskite M Nasir, M Khan, S Kumar, S Bhatt, N Patra, D Bhattacharya, SN Jha, ... Journal of Magnetism and Magnetic Materials 483, 114-123 , 2019 2019 Citations: 56
Li‐La‐Zr‐O Garnets with High Li‐Ion Conductivity and Air‐Stability by Microstructure‐Engineering M Nasir, JY Park, P Heo, KH Choi, HJ Park Advanced Functional Materials 33 (35), 2303397 , 2023 2023 Citations: 55
Correlation of octahedral distortion with vibrational and electronic properties of LaFe1-xTixO3 nanoparticles EG Rini, A Paul, M Nasir, R Amin, MK Gupta, R Mittal, S Sen Journal of Alloys and Compounds 830, 154594 , 2020 2020 Citations: 37
Evidence of cluster-glass and Griffiths-like phases in partially ordered La2FeMnO6 double perovskite M Nasir, M Khan, SA Agbo, S Bhatt, S Kumar, S Sen Journal of Physics D: Applied Physics 53 (37), 375003 , 2020 2020 Citations: 33
Exploring the role of Fe substitution on electronic, structural, and magnetic properties of La 2 NiMnO 6 double perovskites M Nasir, M Khan, EG Rini, SA Agbo, S Sen Applied Physics A 127, 1-14 , 2021 2021 Citations: 30
Role of compensating Li/Fe incorporation in Cu 0.945 Fe 0.055− x Li x O: structural, vibrational and magnetic properties M Nasir, N Patra, MA Ahmed, DK Shukla, S Kumar, D Bhattacharya, ... RSC Advances 7 (51), 31970-31979 , 2017 2017 Citations: 28
Improved Room-Temperature Ferromagnetism in Nd-Doped SnO 2 Nanostructures through Defect Engineering A Ahmed, M Nasir, M Hashim, P Tripathi, BS Choi The Journal of Physical Chemistry C 125 (40), 22175-22187 , 2021 2021 Citations: 22
Influence of Cation Order and Valence States on Magnetic Ordering in La 2 Ni 1− x Mn 1+ x O 6 M Nasir, M Khan, S Bhatt, AK Bera, M Furquan, S Kumar, SM Yusuf, ... physica status solidi (b) 256 (11), 1900019 , 2019 2019 Citations: 22
Lithium-Ion Conduction Pathways in LLZO-PEO Composite Solid Electrolytes J Seo, M Nasir, HJ Park ACS Applied Energy Materials 8 (3), 1518–1525 , 2025 2025 Citations: 19
Enhanced B-site cation ordering and improved magnetic properties: Role of A-site Bi substitution in La2NiMnO6 double perovskites M Nasir, AK Pathak, J Kubik, D Malaviya, V Krupa, A Dasgupta, S Sen Journal of Alloys and Compounds 896, 162713 , 2022 2022 Citations: 19
X-ray structural studies on solubility of Fe substituted CuO M Nasir, N Patra, DK Shukla, D Bhattacharya, S Kumar, DM Phase, ... RSC advances 6 (105), 103571-103578 , 2016 2016 Citations: 19
Excellent electrochemical response of Ce stabilized cubic Li7La3Zr2O12 M Nasir, J Seo, JS Park, HJ Park Journal of the European Ceramic Society 44 (7), 4606-4611 , 2024 2024 Citations: 14
Anomalous Optoelectric Properties of an Ultrathin Ruthenium Film with a Surface Oxide Layer for Flexible Transparent Conducting Electrodes JM Oh+, M Nasir+, B Ryu, HJ Yun, CJ Choi, JS Bae, HJ Park Advanced Functional Materials 32 (14), 2109330 , 2022 2022 Citations: 14
Zn1− xSixO: Improved optical transmission and electrical conductivity T Srivastava, A Sadanandan, G Bajpai, S Tiwari, R Amin, M Nasir, ... Ceramics International 43 (7), 5668-5673 , 2017 2017 Citations: 14
Cluster spin-glass-like dynamics in Mn-rich La2Ni0. 5Mn1. 5O6 ferromagnetic insulator M Nasir, S Kumar, AK Bera, M Khan, SM Yusuf, S Sen Journal of Physics: Condensed Matter 33 (22), 225803 , 2021 2021 Citations: 11
Calcination-Driven Enhancement of LAGP for High-Performance Solid-State Lithium Metal Batteries SI Jung+, M Nasir+, HJ Park Journal of Materials Chemistry A 13 (6), 4624-4633 , 2025 2025 Citations: 9
Exploring complex magnetic behavior induced by Mn in LaNiO 3 perovskite A Ahmed, M Nasir, HJ Park, M Furquan, M Hashim, BS Choi Applied Physics A 129 (8), 581 , 2023 2023 Citations: 9
Cu 1– x Fe x O: hopping transport and ferromagnetism M Nasir, R Islam, MA Ahmed, S Ayaz, G Kumar, S Kumar, CL Prajapat, ... Royal Society Open Science 4 (9), 170339 , 2017 2017 Citations: 9
