Journal of Superconductivity and Novel Magnetism最新文献_第8页

Defect-Mediated Ferromagnetism and Visible-Light Bandgap Narrowing in Fe-Substituted BaSnO3 铁取代BaSnO3中缺陷介导的铁磁性和可见光带隙缩小

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-01-04 DOI: 10.1007/s10948-025-07124-1

S. Sumithra, S. Namagal, M. Jayavel, P. N. Poovizhi

{"title":"Defect-Mediated Ferromagnetism and Visible-Light Bandgap Narrowing in Fe-Substituted BaSnO3","authors":"S. Sumithra, S. Namagal, M. Jayavel, P. N. Poovizhi","doi":"10.1007/s10948-025-07124-1","DOIUrl":"10.1007/s10948-025-07124-1","url":null,"abstract":"<div>This study investigates the role of Fe dopant induced defects in tailoring the physicochemical and functional properties of hydrothermally synthesized BaSnO3 (BSO) nanostructures. XRD and Raman analyses confirmed the successful incorporation of Fe into the cubic perovskite lattice without the formation of secondary phases. The FTIR spectra further revealed distinct vibrational bands corresponding to Ba–O and Sn–O stretching modes, substantiating the chemical bonding and integrity of the perovskite framework. Morphological analysis showed irregular rod-like nanostructures, indicative of dopant-driven growth modifications. Optical studies revealed Fe-induced modulation of the electronic band structure, resulting in measurable band gap reduction and enhanced defect-related visible emissions in the photoluminescence spectra. Magnetic characterization demonstrated robust room-temperature ferromagnetism in all Fe-doped samples, with M–H loop analysis and ESR measurements confirming oxygen-vacancy–mediated exchange interactions as the origin of magnetization. These findings establish Fe-doped BSO as a multifunctional material that simultaneously exhibits tunable optical band gaps, defect-driven luminescence, and stable ferromagnetism, underscoring its potential for application in dilute magnetic semiconductor–based spintronic and optoelectronic devices.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145930006","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}

引用次数: 0

First-principles Study of the Optical and Spin Properties of SnS₂/MoS₂ Heterostructures Induced by Transition Metal Doping 过渡金属掺杂诱导的SnS₂/MoS₂异质结构光学和自旋性质的第一性原理研究

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-01-04 DOI: 10.1007/s10948-025-07123-2

Tong Yuan, Guili Liu, Guoying Zhang

{"title":"First-principles Study of the Optical and Spin Properties of SnS₂/MoS₂ Heterostructures Induced by Transition Metal Doping","authors":"Tong Yuan, Guili Liu, Guoying Zhang","doi":"10.1007/s10948-025-07123-2","DOIUrl":"10.1007/s10948-025-07123-2","url":null,"abstract":"<div>Two-dimensional heterostructures have become a research focus in materials science, driven by their flexible and adjustable electronic, magnetic, and optical characteristics. As materials with significant potential for optoelectronic and spintronic devices, they exhibit a wide range of application prospects. However, the inherent non-magnetic properties of the SnS2/MoS2 heterostructure pose a significant constraint on its potential applications within the realm of spintronics. Therefore, the incorporation of transition metals to impart magnetism is crucial for further expanding the boundaries of spintronic applications. In the present study, we employed first-principles calculations to conduct an in-depth analysis of the photoelectric and magnetic properties of TM/SnS2/MoS2 heterostructures, where transition metal (TM = Mn, Fe, Co, Ni, Cu) atoms replace Sn atoms in the heterostructure. The results of the study are as follows: when doped with Mn and Co, the SnS2/MoS2 heterostructure exhibits half-metallic properties; when doped with Fe and Cu, it shows characteristics of a magnetic semiconductor; and when doped with Ni, it behaves as a non-magnetic semiconductor. Additionally, the doping of transition metals increases the static dielectric constant and results in the light absorption edge shifting toward longer wavelengths, a phenomenon known as redshift. Therefore, transition metal doping is shown to effectively regulate both the optoelectronic and spintronic characteristics of the SnS₂/MoS₂ heterostructure. The theoretical insights derived from this study lay a foundational framework for the practical deployment of TM/SnS₂/MoS₂ heterostructures in optoelectronic and spintronic technologies, indicating that such heterostructures are promising candidates for high-quality spintronic and optoelectronic devices.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145930005","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}

引用次数: 0

Influence of the Drawing Angle in Drawing of Bi-2223/Ag HTS Wire 拉拔角度对Bi-2223/Ag高温超导丝拉拔的影响

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-01-03 DOI: 10.1007/s10948-025-07109-0

Xiaobo Ma, Shengnan Zhang, Lihua Jin, Baitao Shao, Xiaoyan Xu, Jianfeng Li

{"title":"Influence of the Drawing Angle in Drawing of Bi-2223/Ag HTS Wire","authors":"Xiaobo Ma, Shengnan Zhang, Lihua Jin, Baitao Shao, Xiaoyan Xu, Jianfeng Li","doi":"10.1007/s10948-025-07109-0","DOIUrl":"10.1007/s10948-025-07109-0","url":null,"abstract":"<div>Mono-filamentary and 37-filamentary Bi2Sr2Ca2Cu3O10+δ (Bi-2223) superconducting tapes were prepared by the powder-in-tube (PIT) technique. In order to improve the engineering current density (Je) of the Bi-2223 tape, we tailored the silver/superconductor ratio (Ag/Sc ratio), filaments adhesion and Ag/superconducting interface of the Bi-2223 tapes. The influence of drawing angles (6° & 14°) during the Bi-2223 wire drawing was systematically studied to optimize wire uniformity. It was found that 37-filamentary Bi-2223/Ag wires with a 6° drawing angle didn't merged when the wire diameter reached 1.51 mm. Additionally, the filament area uniformity of wires prepared with a 6° drawing angle was superior to that of wires with a 14° drawing angle. Furthermore, the smaller 6° drawing angle significantly enhanced the filament density of Bi-2223 green wires, thereby affecting the Bi-2223 phase formation rate. Owning to increase of filament density and improvement Ag/superconducting core interface, the critical current density (Jc) value increase from 23.6 kA/cm2 to 27.1 kA/cm2.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145886889","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}

引用次数: 0

Disorder-controlled Superconducting Properties in thin Molybdenum-Rhenium Films 钼铼薄膜的无序控制超导特性

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-12-26 DOI: 10.1007/s10948-025-07113-4

I. N. Pavlov, A. I. Lomakin, S. S. Svyatodukh, N. A. Titova, K. I. Khilay, E. M. Baeva, A. I. Kolbatova, G. N. Goltsman

引用次数: 0

Decoupling Perpendicular Anisotropy and Dzyaloshinskii-Moriya Interaction in Ultrathin Ferromagnets by Defocused Ga⁺ Ion Beam Irradiation 离焦Ga +离子束辐照超薄铁磁体中垂直各向异性解耦和Dzyaloshinskii-Moriya相互作用

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-12-26 DOI: 10.1007/s10948-025-07114-3

A.V. Ognev, A. Yu. Samardak, A.G. Kolesnikov, M.A. Bazrov, A.V. Davydenko, E.V. Pustovalov, A.A. Pervishko, D. Yudin, A.V. Sadovnikov, S.A. Nikitov, C.H. Wan, X.F. Han, A.S. Samardak

{"title":"Decoupling Perpendicular Anisotropy and Dzyaloshinskii-Moriya Interaction in Ultrathin Ferromagnets by Defocused Ga⁺ Ion Beam Irradiation","authors":"A.V. Ognev, A. Yu. Samardak, A.G. Kolesnikov, M.A. Bazrov, A.V. Davydenko, E.V. Pustovalov, A.A. Pervishko, D. Yudin, A.V. Sadovnikov, S.A. Nikitov,  C.H. Wan, X.F. Han, A.S. Samardak","doi":"10.1007/s10948-025-07114-3","DOIUrl":"10.1007/s10948-025-07114-3","url":null,"abstract":"<div>The precise and local manipulation of perpendicular magnetic anisotropy (PMA) and the interfacial Dzyaloshinskii-Moriya interaction (iDMI) is paramount for the development of skyrmion-based spintronic devices. While light-ion irradiation has been explored for magnetic property modification, the use of heavy ions offers a pathway for enhanced interfacial intermixing and potentially decoupled control of these key parameters. Here, we demonstrate that defocused Ga⁺ ion beam irradiation acts as a powerful tool for the graded, local tuning of magnetic properties in Ru/Co/W/Ru multilayers. We achieve a continuous transformation of the magnetic domain structure, from labyrinthine stripes to isolated sub-micrometer skyrmion bubbles, by selectively varying the irradiation fluence. Crucially, we find that PMA and iDMI exhibit distinct degradation rates upon irradiation, with the anisotropy energy decreasing fourfold while the iDMI strength is halved, enabling a widened window for skyrmion stabilization. Micromagnetic simulations, calibrated with experimental parameters, confirm the formation of nanoscale skyrmions (~ 130 nm) at high fluences where direct optical observation is limited. Combined experimental characterization and first-principles calculations reveal that this decoupling stems from Ga⁺-induced interfacial alloying, which disproportionately affects the interface-sensitive origins of PMA and iDMI. This work establishes defocused ion beam irradiation as a versatile nanofabrication technique for designing two-dimensional magnetic metasurfaces and prototype race-track memory devices.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145831116","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}

引用次数: 0

Effect of Structure Evolution of Cu-7.7%Nb Microcomposite Under Deformation on the Electrical Conductivity of Composite Wire 变形条件下Cu-7.7%Nb微复合材料组织演变对复合丝电导率的影响

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-12-26 DOI: 10.1007/s10948-025-07095-3

Irina Deryagina, Elena Popova, Evgeny Patrakov, Maria Polikarpova, Viktor Pantsyrny

{"title":"Effect of Structure Evolution of Cu-7.7%Nb Microcomposite Under Deformation on the Electrical Conductivity of Composite Wire","authors":"Irina Deryagina, Elena Popova, Evgeny Patrakov, Maria Polikarpova, Viktor Pantsyrny","doi":"10.1007/s10948-025-07095-3","DOIUrl":"10.1007/s10948-025-07095-3","url":null,"abstract":"<div>The in-situ Cu-7.7Nb microcomposite (MC) wires have been studied at different drawing stages before and after intermediate annealing. It is demonstrated that both deformation and intermediate annealing of the MCs are accompanied by a noticeable change in the Nb/Cu interface density, which affects not only the strength, but also the electrical conductivity of the composite wire. The intermediate annealing temperature affects the conductivity of the wire at all stages of deformation that follow the annealing. The wire has the maximum conductivity after annealing at 800 °C. Based on scanning and transmission electron microscopy data, dependences of the Nb filament thicknesses, their aspect ratios, and interface densities on the composite strain have been constructed. The change of the Nb filaments morphology under intermediate annealing is accompanied with a decrease in the Cu/Nb interface density, the latter being a factor responsible for the increase in composite conductivity under annealing. Conductivity increases with increasing annealing temperature. These differences are preserved throughout the entire deformation process up to the final wire diameter of 0.05 mm.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145831117","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}

引用次数: 0

DFT Investigation of the Multifunctional Properties of ThX5 (X = Fe, Ni) Compounds ThX5 （X = Fe, Ni）化合物多功能性质的DFT研究

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-12-22 DOI: 10.1007/s10948-025-07106-3

A. Jabar, S. Idrissi, L. Bahmad

{"title":"DFT Investigation of the Multifunctional Properties of ThX5 (X = Fe, Ni) Compounds","authors":"A. Jabar, S. Idrissi, L. Bahmad","doi":"10.1007/s10948-025-07106-3","DOIUrl":"10.1007/s10948-025-07106-3","url":null,"abstract":"<div>This study presents a comprehensive first-principles investigation of the structural, elastic, electronic, magnetic, optical, and thermoelectric properties of hexagonal ThX5 compounds (X = Fe, Ni) using Density Functional Theory (DFT) within the GGA + U framework. The elastic constants and 3D mechanical property visualizations demonstrate strong anisotropy in ThFe5, making it suitable for directional mechanical applications, while ThNi5 displays more isotropic behavior, favoring uniform load-bearing roles. In addition, electronic structure analysis, including TDOS, PDOS, and band structures, confirms the metallic and magnetic nature of both materials, with ThFe5 exhibiting stronger ferromagnetism due to higher magnetic moments and larger spin splitting. These magnetic features significantly influence transport and optical properties. The optical analysis, based on complex dielectric functions, reveals strong direction-dependent optical responses, with plasma frequencies and reflectivity spectra confirming metallic behavior in both compounds. Notably, ThFe5 shows higher anisotropies in optical conductivity and extinction coefficients than ThNi5. Furthermore, thermoelectric performance, evaluated using Boltzmann transport theory, exhibits distinct temperature-dependent behavior in the Seebeck coefficient, electrical conductivity, and power factor. ThFe5 displays a complex spin-dependent thermoelectric response with a temperature-induced carrier-type crossover, while ThNi5 shows a stable p-type dominance at higher temperatures.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145831292","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}

引用次数: 0

Enhancement of the Superconducting Transition Temperature in Mn-doped CaKFe4As4 Processed by the High gas-pressure and High-temperature Synthesis Method 高压高温合成法提高mn掺杂CaKFe4As4超导转变温度

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-12-20 DOI: 10.1007/s10948-025-07115-2

Manasa Manasa, Mohammad Azam, Tatiana Zajarniuk, Svitlana Stelmakh, Tomasz Cetner, Andrzej Morawski, Shiv J. Singh

{"title":"Enhancement of the Superconducting Transition Temperature in Mn-doped CaKFe4As4 Processed by the High gas-pressure and High-temperature Synthesis Method","authors":"Manasa Manasa, Mohammad Azam, Tatiana Zajarniuk, Svitlana Stelmakh, Tomasz Cetner, Andrzej Morawski, Shiv J. Singh","doi":"10.1007/s10948-025-07115-2","DOIUrl":"10.1007/s10948-025-07115-2","url":null,"abstract":"<div>A series of Mn-doped CaKFe4As4 samples, CaK(Fe1 − xMnx)4As4 with x values of 0, 0.005, 0.01, 0.02, 0.03, 0.04, and 0.05, are synthesized using two distinct routes: conventional synthesis process at ambient pressure (CSP), and high gas-pressure and high-temperature synthesis (HP-HTS) method. Comprehensive characterizations are performed on these samples to investigate their superconducting properties. This study examines the effects of Mn substitution at Fe sites in the FeAs layer on the superconducting properties of the CaKFe4As4 (1144) material. The HP-HTS process improves the microstructure and phase purity of the parent sample (x = 0), resulting in an enhanced superconducting transition temperature (Tc). In contrast, Mn doping via the CSP method in CaKFe4As4 reduces the sample quality and superconducting performance. Notably, the high-pressure synthesis method leads to an increase in the Tc by 3 to 7 K, particularly at low Mn concentrations. While the critical current density (Jc) of the parent sample (x = 0) shows a significant enhancement under the applied magnetic fields, Jc decreases for Mn-doped CaKFe4As4 bulks. These results demonstrate that high-pressure synthesis is an effective approach to improve the superconducting properties of Mn-doped 1144 compounds.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-025-07115-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145779334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Synthesis, Structural and Magnetic Properties in the SrFe₁₂₋₂ₓ(CoSn)ₓO₁₉/PLA Composite SrFe₁₂₁ₓ（CoSn）ₓO₁₉/PLA复合材料的合成、结构和磁性能

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-12-17 DOI: 10.1007/s10948-025-07112-5

A. Vega-García, P. A. Mariño-Castellanos, Y. Hidalgo-Peña, V. Ch. Costa-Lira, Ramón R. Peña-Garcia, F. Guerrero

{"title":"Synthesis, Structural and Magnetic Properties in the SrFe₁₂₋₂ₓ(CoSn)ₓO₁₉/PLA Composite","authors":"A. Vega-García, P. A. Mariño-Castellanos, Y. Hidalgo-Peña, V. Ch. Costa-Lira, Ramón R. Peña-Garcia, F. Guerrero","doi":"10.1007/s10948-025-07112-5","DOIUrl":"10.1007/s10948-025-07112-5","url":null,"abstract":"<div>The SrFe12 − 2x(CoSn)xO19 (x = 0.1 and 0.3) hexaferrites and their [y(SrFe12 − 2xCoxSnxO₁₉)+(1 − y)PLA] (y = 0.0–1.0) composites were synthesized via solid-state reaction assisted by high-energy milling and melt-compression. X-ray diffraction (XRD) and Rietveld refinement confirmed the magnetoplumbite structure with minor α-Fe₂O₃ and CoFe₂O₄ phases (≤ 14 wt%) at x = 0.3. Lattice parameters expanded slightly (a = 5.884 to 5.892 Å; c = 23.06 to 23.09 Å), accompanied by crystallite growth (τ ≈ 57.5→61.3 nm) and microstrain increase (ε = 0.09→0.12%). Saturation magnetization (Ms) varied nonlinearly with doping, decreasing to 216 × 10³ A·m⁻¹ at x = 0.1, then rising to 259 × 10³ A·m⁻¹ for x = 0.3, while coercivity (Hc) dropped from 204 × 10³ to 65 × 10³ A·m⁻¹. The effective anisotropy constant (Keff) ranged 2.3–3.2 × 10⁵ J·m⁻³ and the anisotropy field (Ha) 1.46–1.67 × 10⁶ A·m⁻¹. For SrMCoSn/PLA composites, XRD revealed coexistence of amorphous PLA and hexaferrite phases, with ferrimagnetic response emerging from y ≥ 0.1. Mₛ increased from 3.4 × 10³ to 59.7 × 10³ A·m⁻¹ as y rose to 0.6, whereas Hc remained nearly constant (~ 2 × 10⁵ A·m⁻¹) up to y = 0.5, decreasing thereafter. The linear rise of Ha (2.45 to 2.60 × 10⁷ A·m⁻¹) with ferrite fraction highlights the interfacial magnetic coupling within the polymer matrix. These results demonstrate tunable structural and magnetic properties in Co-Sn-doped SrM/PLA composites, enabling their application in magnetically responsive and multifunctional materials.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145778811","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}

引用次数: 0

Structural, Magnetic, Dielectric and Ferroelectric Properties of B-site Doped LaNiO3 Half Metals b位掺杂LaNiO3半金属的结构、磁性、介电和铁电性质

IF 1.7 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-12-16 DOI: 10.1007/s10948-025-07085-5

Roshima N S, Jyotirmayee Satapathy, M. Sivakumar

{"title":"Structural, Magnetic, Dielectric and Ferroelectric Properties of B-site Doped LaNiO3 Half Metals","authors":"Roshima N S, Jyotirmayee Satapathy, M. Sivakumar","doi":"10.1007/s10948-025-07085-5","DOIUrl":"10.1007/s10948-025-07085-5","url":null,"abstract":"<div>This study reports the synthesis of pure and transition metal doped at the Ni-site of LNO perovskites using solid-state reaction route. Various characterization techniques such as X-ray diffraction (XRD), High Resolution Transmission Electron Microscopy (HR-TEM), Raman spectroscopy, Vibrating Sample Magnetometer (VSM), dielectric spectroscopy and ferroelectric (P-E loop) tests are employed to explore the influence of transition metal ions, i.e. Cr, Fe and Mn on the Ni-site of pure LNO samples. The structure is reported to be distorted rhombohedral phase, with a better phase purity for Fe-LNO comparatively. The average crystallite sizes calculated for pure LNO, Cr-LNO, Fe-LNO and Mn-LNO are 6.59 nm, 10.96 nm, 9.15 nm, and 12.67 nm respectively. HR-TEM reveals that the corresponding grain sizes are approximately 230 nm, 210 nm, 240 nm and 280 nm. Raman spectra exhibit five active vibrational modes, and noticeable blue shift in the doped samples, attributing to the compressive lattice strain. Magnetic characterization by VSM demonstrates weak ferromagnetism in Cr-doped LNO, soft magnetic behavior in Fe -doped LNO, and antiferromagnetic characteristics in Mn-doped LNO. Dielectric measurements show an increase and decrease in dielectric constant and loss for Mn and Fe doped LNOs compared to pure and Cr doped LNO. Dielectric properties with frequency show a slight relaxor behavior. The P-E hysteresis loops however are unsaturated, lossy and lack spontaneous polarization, indicating no evidence for ferroelectric behavior in all the samples.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145778655","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}

引用次数: 0