Structural, magnetic, DC resistivity and dielectric properties of Ni-doped strontium hexaferrites SrNixFe12-xO19

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-06-01 DOI:10.1016/j.ceramint.2025.02.182

D. Parajuli , N. Murali , K. Samatha

{"title":"Structural, magnetic, DC resistivity and dielectric properties of Ni-doped strontium hexaferrites SrNixFe12-xO19","authors":"D. Parajuli , N. Murali , K. Samatha","doi":"10.1016/j.ceramint.2025.02.182","DOIUrl":null,"url":null,"abstract":"<div><div>Nickel-doped strontium hexaferrites, SrNixFe12-xO19 (x = 0.00, 0.03, 0.06, 0.09, 0.12), were synthesized using the co-precipitation method. X-ray diffraction (XRD) analysis confirmed the formation of an M-type hexagonal structure (P63/mmc, JCPDS card no: 33–1340), with secondary phases (α-Fe2O3 and NiFe2O4) emerging at higher Ni concentrations (x ≥ 0.06). Lattice parameters and X-ray density were found to increase with Ni substitution. Pure hexaferrite phases were maintained for x ≤ 0.03, while additional phases appeared for x > 0.03. Scanning electron microscopy (SEM) revealed well-defined hexagonal plate-like grains, with a minimum grain size of 675.65 nm observed at x = 0.06. Magnetic characterization showed a decrease in saturation magnetization (Ms), remanence (Mr), and coercivity (Hc), with the lowest values of 46.89 emu/g, 28.22 emu/g, and 3673.88 Oe, respectively, at x = 0.06. The samples exhibited single-domain behavior with remanence ratios (Mr/Ms) ranging between 0.6018 and 0.6966. DC resistivity measurements indicated semiconducting behavior, with resistivity increasing as temperature decreased. The dielectric constant and loss factor decreased with increasing Ni content, the electric modulus, and impedance analysis suggesting a non-Debye type of relaxation with suitability for high-frequency applications. These findings demonstrate that Ni-doped strontium hexaferrites possess tunable structural, magnetic, and dielectric properties, making them promising candidates for use in high-frequency, low-loss devices such as capacitors, filters, and energy storage applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20143-20163"},"PeriodicalIF":5.1000,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0272884225008508","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

Nickel-doped strontium hexaferrites, SrNi_xFe_12-xO₁₉ (x = 0.00, 0.03, 0.06, 0.09, 0.12), were synthesized using the co-precipitation method. X-ray diffraction (XRD) analysis confirmed the formation of an M-type hexagonal structure (P6₃/mmc, JCPDS card no: 33–1340), with secondary phases (α-Fe₂O₃ and NiFe₂O₄) emerging at higher Ni concentrations (x ≥ 0.06). Lattice parameters and X-ray density were found to increase with Ni substitution. Pure hexaferrite phases were maintained for x ≤ 0.03, while additional phases appeared for x > 0.03. Scanning electron microscopy (SEM) revealed well-defined hexagonal plate-like grains, with a minimum grain size of 675.65 nm observed at x = 0.06. Magnetic characterization showed a decrease in saturation magnetization (M_s), remanence (M_r), and coercivity (H_c), with the lowest values of 46.89 emu/g, 28.22 emu/g, and 3673.88 Oe, respectively, at x = 0.06. The samples exhibited single-domain behavior with remanence ratios (M_r/M_s) ranging between 0.6018 and 0.6966. DC resistivity measurements indicated semiconducting behavior, with resistivity increasing as temperature decreased. The dielectric constant and loss factor decreased with increasing Ni content, the electric modulus, and impedance analysis suggesting a non-Debye type of relaxation with suitability for high-frequency applications. These findings demonstrate that Ni-doped strontium hexaferrites possess tunable structural, magnetic, and dielectric properties, making them promising candidates for use in high-frequency, low-loss devices such as capacitors, filters, and energy storage applications.

查看原文本刊更多论文

ni掺杂锶六铁体SrNixFe12-xO19的结构、磁性、直流电阻率和介电性能

采用共沉淀法合成了掺杂镍的锶六铁体SrNixFe12-xO19 （x = 0.00, 0.03, 0.06, 0.09, 0.12）。x射线衍射（XRD）分析证实，在较高的Ni浓度（x≥0.06）下，形成了m型六边形结构（P63/mmc， JCPDS卡号：33-1340），并出现了次级相（α-Fe2O3和NiFe2O4）。晶格参数和x射线密度随着Ni的取代而增加。在x≤0.03时保持纯六铁素体相，在x >时出现附加相；0.03. 扫描电镜（SEM）观察到清晰的六角形片状晶粒，在x = 0.06时最小晶粒尺寸为675.65 nm。磁性表征表明，在x = 0.06时，饱和磁化强度（Ms）、剩磁强度（Mr）和矫顽力（Hc）均有所降低，分别为46.89 emu/g、28.22 emu/g和3673.88 Oe。样品表现出单畴行为，残余比（Mr/Ms）在0.6018 ~ 0.6966之间。直流电阻率测量显示出半导体行为，电阻率随温度降低而增加。介电常数和损耗因子随Ni含量的增加而降低，电模量和阻抗分析表明非debye型弛豫适合于高频应用。这些发现表明，ni掺杂锶六铁氧体具有可调的结构、磁性和介电性能，使其成为高频、低损耗器件（如电容器、滤波器和储能应用）的有希望的候选者。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.