Journal of Magnetism and Magnetic Materials最新文献

{"title":"Structural, magnetic, electronic, optical, thermoelectric, and magnetocaloric properties of Pb2NbFeO6: A density functional theory and Monte Carlo simulations","authors":"M. Jerrari,&nbsp;R. Masrour","doi":"10.1016/j.jmmm.2026.173875","DOIUrl":"10.1016/j.jmmm.2026.173875","url":null,"abstract":"<div><div>We employed Monte Carlo simulations in conjunction with density functional theory (DFT), using the GGA + SOC + U (Generalized Gradient Approximation with Spin-Orbit Coupling and Hubbard U correction) within the Wien2k framework, to investigate the structural, electronic, magnetic, optical, thermoelectric, and magnetocaloric characteristics of Pb₂NbFeO₆. Analysis of the density of states and band structures reveals ferromagnetic semiconducting behavior, with spin-up (L-Γ) and spin-down (L-Γ) indirect band gaps of 3.5 and 1.9 eV, respectively. Furthermore, the real part of the dielectric tensor shows a gradual increase, attaining a maximum at 3.3 eV, which reflects a strong polarization response within the visible spectrum, the imaginary component of the dielectric function exhibits a pronounced peak near 5 eV, reflecting strong optical absorption in the ultraviolet (UV) region, optical conductivity, absorption coefficient, optical reflectivity, refractive index, and extinction coefficient are examined. Computing the Seebeck coefficient, electrical conductivity, electronic thermal conductivity, power factor, figure of merit, and Hall coefficient as functions of temperature is evaluated. We have calculated magnetization, susceptibility, magnetic entropy changes (−ΔS), adiabatic temperature changes (ΔT), and relative cooling power (RCP) using Monte Carlo simulation methods. From the simulation results, a critical temperature of 32 K and an exchange coupling constant of J_Fe–Fe = 16 K are obtained. These results indicate that double perovskite materials hold promise for potential use in solar cells and optoelectronic devices, as well as thermoelectric applications.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"641 ","pages":"Article 173875"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146073683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic properties and cryogenic magnetocaloric performances in Gd2NbLaO7 compound","authors":"Xijia Chen,&nbsp;Junmiao Lin,&nbsp;Xiaoli Gong,&nbsp;Liyao Zhu,&nbsp;Lingwei Li","doi":"10.1016/j.jmmm.2026.173826","DOIUrl":"10.1016/j.jmmm.2026.173826","url":null,"abstract":"<div><div>A number of Gd-incorporated magnetic solids have been recently determined with respect to their magnetocaloric performances, which are attempted to identify candidate magnetocaloric materials for cryogenic magnetic refrigeration (MR) application and unveil their intrinsic magneto-thermal properties. We herein synthesized the single-phased Gd₂NbLaO₇ compound by a solid-state reaction method and experimentally unveiled its structural, chemical states, magnetic, and magnetocaloric properties. The Gd₂NbLaO₇ compound is crystallized in an orthorhombic structure with <em>C</em>222₁ space group. The consistent elementals in Gd₂NbLaO₇ compound all distribute uniformly and with the valence states as Gd³⁺, Nb⁵⁺, La³⁺, and O²⁻, respectively. Large reversible cryogenic magnetocaloric effects with notable performances in Gd₂NbLaO₇ compound were realized. The maximum magnetic entropy change and refrigerant capacity/relative cooling power (magnetic field variation of 0–7 T) of Gd₂NbLaO₇ compound are identified to be 35.18 J kg⁻¹ K⁻¹ and 248.42/330.51 J kg⁻¹, respectively, which surpass most of recently updated Gd-incorporated magnetic solids with notable magnetocaloric performances, making present Gd₂NbLaO₇ compound also considerable for cryogenic MR applications.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"641 ","pages":"Article 173826"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improvement in magnetic, optical and dielectric behavior on erbium addition to Mg0.5Mn0.5Fe2O4 for device applications","authors":"Gorachand Biswal ,&nbsp;Babita Ojha ,&nbsp;Varsa Purohit ,&nbsp;Rakesh Ranjan Sahoo ,&nbsp;Dhrubananda Behera ,&nbsp;Deba Nirmalya Das","doi":"10.1016/j.jmmm.2026.173832","DOIUrl":"10.1016/j.jmmm.2026.173832","url":null,"abstract":"<div><div>The ferrite samples Mg_0.5Mn_0.5Fe_2-xEr_xO₄ (x = 0, 0.02, 0.04, 0.06, 0.1) prepared using the solid-state route were evaluated for microwave absorption applications. X-ray diffraction with Rietveld refinement revealed multiphase characteristics and the coexistence of a spinel phase with an orthorhombic phase attributed to the larger Er³⁺ ionic radius. The SEM analysis of rare earth-doped spinel ferrites reveals that grain size and porosity are significantly influenced by doping concentration, which in turn strongly affect the dielectric and magnetic properties. AFM indicated high surface roughness. The favourable figures of dielectric constant and loss factor recorded at frequency variation makes the material suitable in high frequency performances. The Er modified ferrites possessing a broad range of relaxation period can interact and effectively absorb an extended range of spectrum from the microwave frequency range. UV–Vis spectroscopy demonstrated an increase in the optical forbidden band gap from 1.06 eV to 2.30 eV after doping of erbium, enhancing light absorption. The combined improvements in optical, dielectric, and thermal properties confirm that Er-modified ferrites are promising candidates for high-frequency, high-temperature microwave absorbing applications. The increase of coercivity with respect to doping concentration may be attributed to the anisotropy due to the strong spin orbit coupling of Er³⁺.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"641 ","pages":"Article 173832"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic Properties and Magnetocaloric Effect in Tb (Fe1-x Mnx)2 Compounds for x = 0, 0.12","authors":"Omar H. El-Talkhawy ,&nbsp;Samy H. Aly ,&nbsp;Sherif Yehia ,&nbsp;Fatema Z. Mohammad","doi":"10.1016/j.jmmm.2026.173853","DOIUrl":"10.1016/j.jmmm.2026.173853","url":null,"abstract":"<div><div>In this work, we present a mean-field study using the two-sublattice model to investigate the magnetothermal and magnetocaloric properties of Tb (Fe_1-x Mn_x)₂ compounds with x = 0 and 0.12. Specifically, we have calculated the magnetization, heat capacity, entropy, isothermal entrop change ΔS_m and adiabatic temperature change ∆T_ad. This study investigates the aforementioned properties at temperatures up to 900 K and magnetic fields up to 5 T. Additionally, we report the relative cooling powers (RCP) in a 5 T field. We have used the Wien2k code to calculate the electron density of states (DOS) for TbFe₂. The maximum values obtained, for TbFe₂, for ΔS_m, ∆T_ad, RCP(S) and RCP(T) for a field change of 5 T are 2.37 J/mol. K, 3.05 K, 410 J/mol. and 1070 K², respectively. The Curie temperatures of the compounds with x = 0 and x = 0.12 are 694 and 626 K respectively. The maximum magnetic entropy, in zero fields, for these two compounds is about 40 J/mol. K. The electronic γ_e = 0.018 J/mol. K² for the x = 0 compound. The nature of the phase transition was analyzed, as well, using the universal curve and Belov-Arrott plots. The scaling exponent n is found to be fairly close to <em>n</em> = 2/3 for second order phase transitions described by the mean-field model. It has been confirmed that the transition is a second-order phase transition in both compounds.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"641 ","pages":"Article 173853"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of vanadium doping and rapid quenching on phase stability and magnetic properties of τ-MnAl alloys","authors":"A.S. Fortuna ,&nbsp;K.S. Nechaev ,&nbsp;N.M. Vazhinskii ,&nbsp;M.V. Gorshenkov ,&nbsp;D.Yu. Karpenkov","doi":"10.1016/j.jmmm.2026.173851","DOIUrl":"10.1016/j.jmmm.2026.173851","url":null,"abstract":"<div><div>This paper focuses on the determination of the influence of V on the stability, magnetic properties, and features of phase transitions in Mn_55-xA_42+xV₃ alloys (x = 0, 2, and 4), both in the cast and rapidly quenched states. It has been shown that vanadium decreases the stability of the ferromagnetic τ-phase. The feasibility of directly producing the τ-phase through rapid quenching has been confirmed by achieving a high proportion of the τ-phase, approximately 90 vol%, in the Mn₅₃Al₄₄V₃ as-quenched alloy. Additionally, the Curie temperature of this alloy has been determined to exhibit hysteresis during heating and subsequent cooling. Based on these findings, it was suggested that Mn₅₃Al₄₄V₃ undergoes a first-order magnetic phase transformation. Based on the experimental data, a Mn-Al-V phase diagram for alloys with a vanadium concentration of 3% and a manganese concentration of 51–55% has been proposed, and a diagram of the dependence of the phase composition in rapidly quenched ribbons on the composition of Mn_55-xA_42+xV₃ has been constructed.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"641 ","pages":"Article 173851"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic interactions in defective ZnFe2O4. A density functional theory study","authors":"Jhon J. Melo Quintero ,&nbsp;Azucena M. Mudarra Navarro ,&nbsp;Victoria I. Fernández ,&nbsp;C.E. Rodríguez Torres ,&nbsp;Leonardo A. Errico","doi":"10.1016/j.jmmm.2026.173835","DOIUrl":"10.1016/j.jmmm.2026.173835","url":null,"abstract":"<div><div>Ferrites (spinel structure, MFe₂O₄) are one of the richest and most studied oxide groups due to their multiple and interesting physical properties and wide applications. Particularly, Zn²⁺Fe³⁺₂O₄ has been largely studied but its magnetic structure is still unresolved. To contribute to the understanding of its magnetic nature we present here a theoretical study of the role of defects (oxygen vacancies, cationic inversion) on the magnetic interactions in Zn-ferrite. ZnFe₂O₄ adopts the normal spinel structure where Zn²⁺ cations are placed at the <em>8a</em> tetrahedral (<em>A</em>) sites and Fe³⁺ populates the <em>16d</em> octahedral (<em>B</em>) sites. Using first-principles calculations based on Density Functional Theory (DFT) and the supercell approach, the energy of multiple magnetic configurations for reduced (ZnFe₂O_{4-<em>δ</em>}), partially inverted, (Zn_1-<em>x</em>Fe_<em>x</em>)[Zn_<em>x</em>Fe_2-<em>x</em>]O₄, and partially inverted and reduced, (Zn_1-<em>x</em>Fe_<em>x</em>)[Zn_<em>x</em>Fe_2-<em>x</em>]O_{4-<em>δ</em>}, Zn-ferrite were calculated and then mapped to a classical Heisenberg spin model to obtain the magnetic exchange couplings <em>J</em>_<em>n</em> up to fifth neighbours. Compared with pristine and normal ZnFe₂O₄, where the interactions Fe(site B)–Fe(site B) up to fifth neighbours (<em>J</em>^<em>BB</em>_<em>i</em>) are antiferromagnetic, in the case of ZnFe₂O_{4-<em>δ</em>} the interaction at second neighbours is ferromagnetic. In the case of (Zn_1-<em>x</em>Fe_<em>x</em>)[Fe_2-<em>x</em>Zn<em>x</em>]O₄ and (Zn_1-<em>x</em>Fe_<em>x</em>)[Zn_<em>x</em>Fe_2-<em>x</em>]O_{4-<em>δ</em>} the interactions Fe(site A)-Fe(site B) resulted to be significantly stronger than <em>J</em>^<em>BB</em>_<em>i</em>. Moreover, the first-neighbour interaction is predicted to be ferromagnetic, while at second neighbours it is antiferromagnetic and dominant. Our results show that ZnFe₂O₄ constitutes a delicate magnetic system, where competing magnetic interactions can be easily affected by defects and highlight its crucial role in promoting different magnetic responses, enabling us to explain the ferrimagnetic response observed at room-temperature in ZnFe₂O₄ nanoparticles and thin films.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"641 ","pages":"Article 173835"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Dy and Tb addition on the structural, thermal and magnetic properties of Nd33Fe67 melt spun alloys","authors":"S. Naveen Rajkumar ,&nbsp;Akshaya Senthilkumar ,&nbsp;D. Arvindha Babu ,&nbsp;M. Manivel Raja ,&nbsp;Elangovan Hemaprabha","doi":"10.1016/j.jmmm.2025.173797","DOIUrl":"10.1016/j.jmmm.2025.173797","url":null,"abstract":"<div><div>In this study, the effect of Dy and Tb addition on structural, thermal and magnetic properties of Nd₃₃Fe₆₇ melt spun ribbons was studied with an aim to stabilize Nd₅Fe₁₇ phase and increase coercivity. Dy and Tb addition led to the formation of partial amorphous phase along with crystalline phases of Nd₂Fe₁₇ and Nd(Fe) solid solution phases at low concentrations (up to Dy = Tb = 4 at.%) and DyFe₂/TbFe₂ phases also form beyond Dy = Tb = 6 at.%. While annealing at 350 °C results in partial formation of the equilibrium Nd₅Fe₁₇ phase along with other existing phases i.e. amorphous, Nd₂Fe₁₇ and Nd(Fe) solid solution, annealing at 670 °C results in only equilibrium Nd₅Fe₁₇, Nd(Fe) solid solution, and DyFe₂/TbFe₂ phases. The Curie temperature of amorphous phase increases with increasing Dy/Tb content for low concentration of Dy/Tb and it decreases for high Dy/Tb concentration. Presence of Dy/Tb atoms in the amorphous phase causes Fe<img>Fe distance to change and influences the exchange interaction thereby affecting the Curie temperature. Presence of amorphous phase having large random anisotropy, Nd₂Fe₁₇ phase having high anisotropy and DyFe₂/TbFe₂ having high anisotropy in Dy/Tb added as spun alloys result in increased coercivity as compared to the alloy having no Dy/Tb. Annealing at 350 °C showed a trend of increasing coercivity with Dy/Tb due to the presence of three hard magnetic phases i.e. amorphous, Nd₂Fe₁₇ and DyFe₂/TbFe₂ phases along with soft magnetic Nd₅Fe₁₇ phase. Annealing at 670 °C resulted in the formation of soft magnetic Nd₅Fe₁₇ phase along with hard magnetic DyFe₂/TbFe₂ phases which showed lowest coercivity observed across all alloys. Dy/Tb addition decreases magnetization in all samples due to their anti-parallel interaction with the amorphous matrix and the ferrimagnetic contribution of DyFe₂/TbFe₂ phases.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"641 ","pages":"Article 173797"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel broken wire localization method for bridge cables based on multi-component magnetic flux leakage testing","authors":"Huanze Liu ,&nbsp;Lingsi Sun ,&nbsp;Runyu Wang ,&nbsp;Yiqing Zou ,&nbsp;Xinjun Wu","doi":"10.1016/j.jmmm.2026.173817","DOIUrl":"10.1016/j.jmmm.2026.173817","url":null,"abstract":"<div><div>Bridge cables, as one of the critical load-bearing elements in cable-stayed bridges, are prone to hidden internal defects that are difficult to detect. In conventional magnetic flux leakage (MFL) testing, the magnetic field decays rapidly with depth, which hinders defect localization. To overcome this limitation, this study proposes a defect localization method based on multi-component MFL signals. Based on the magnetic dipole model (MDM) of a single broken wire, the spatial-domain summation preprocessing in the circumferential direction is proposed to enhance weak responses. For axial localization, cross-validation of the summed differential axial component and the radial component improves robustness. In addition, an asymmetric peak–valley full width at half-maximum (APV-FWHM) feature is introduced for depth localization, which reduces amplitude dependence and decouples depth localization from circumferential positioning. In order to validate the method, an experimental platform for bridge cable based on MFL testing was established. Experimental validation on a PECS7–127 cable successfully detected all broken-wire defects at depths of up to 42 mm with a 95% confidence interval of 97.9–100%. The axial localization results from different components indicated strong consistency, reaching 94.9% accuracy within a ± 5 mm tolerance. In addition, circumferential defect regions were effectively identified, and radial localization achieved 97.7% accuracy when a tolerance of ±1 layer was permitted. These findings provide preliminary validation of the feasibility and reliability of the proposed method for testing and localizing a single broken wire defect in bridge cables using multi-component MFL signals.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"641 ","pages":"Article 173817"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145975169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of different scanning strategies on the magnetocaloric effect and mechanical properties of La(Fe,Si)13-based alloys prepared by selective laser melting","authors":"Bo-Yu Song ,&nbsp;Li-Quan Wang ,&nbsp;Yong-Quan Han ,&nbsp;Juan Cheng ,&nbsp;Tao Chen ,&nbsp;Xiang Jin ,&nbsp;Jiao-Hong Huang","doi":"10.1016/j.jmmm.2026.173850","DOIUrl":"10.1016/j.jmmm.2026.173850","url":null,"abstract":"<div><div>Room-temperature magnetic refrigeration is a new type of solid-state refrigeration technology. As refrigerants, La (Fe, Si)₁₃-based alloys have become candidate refrigeration materials because of their considerable magnetocaloric effect and adjustable Curie temperature, but their inherent brittleness yields severe limitations. Selective laser melting (SLM) technology in additive manufacturing could solve the problems associated with the formation and processing of materials. In this study, La(Fe, Al, Si)₁₃ alloys were prepared via SLM technology, and the effects of different scanning strategies on the surface morphology, microstructure, magnetocaloric properties and mechanical properties were systematically analysed. The results revealed that the content of the 1:13 main phase is highest in the sample formed through the interlayer rotation 67° scanning strategy, the maximum magnetic entropy change can reach 8.07 J/(kg · K), and the compressive strength and hardness are greatest. This strategy provides a shorter laser scanning path and easily achieves a consistent solidification rate, thus effectively reducing stress concentration, which is conducive to the application of magnetic refrigeration technology.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"641 ","pages":"Article 173850"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantum teleportation and entanglement via quantum channels in bimetallic Fe2Cu2 based on spin-1/2 Ising-Heisenberg chain model","authors":"Mustapha Ait Lamine,&nbsp;Hamid Ez-Zahraouy","doi":"10.1016/j.jmmm.2026.173869","DOIUrl":"10.1016/j.jmmm.2026.173869","url":null,"abstract":"<div><div>This paper investigates quantum teleportation and entanglement in polymeric bimetallic Fe₂Cu₂ coordination compounds, employing the exactly solvable spin-1/2 Ising-Heisenberg model. Using the transfer-matrix method, we systematically analyze how the anisotropy parameter Δ affects quantum entanglement and teleportation fidelity through Heisenberg spin dimers functioning as quantum channels. Additionally, we analytically calculate the channel concurrence, output state concurrence, formation entanglement, fidelity, and average fidelity as functions of temperature, magnetic field, and anisotropy for different input states, with comprehensive thermomagnetic phase diagrams identifying regions of quantum advantage. Our analysis reveals that Δ governs the fundamental balance between entanglement capacity and magnetic thermal robustness. Consequently, the strongly anisotropic regime is very stable, retaining quantum advantage even at high temperatures and strong magnetic fields due to improved longitudinal correlations, whereas the isotropic case reaches the best teleportation fidelity at low temperatures and weak fields. The results indicate demonstrate that maximally entangled input states consistently outperform partially entangled states. These findings establish that magnetic coordination polymers with tunable anisotropy constitute promising platforms for quantum communication applications, offering a balance between operational fidelity and environmental robustness.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"641 ","pages":"Article 173869"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}