{"title":"研究共沉淀法合成的 ZnO/CoFe2O4 纳米复合材料在高频应用中的结构、介电和磁特性","authors":"J. Saini, S. Rohilla, R. Patwa, S. Sunder","doi":"10.1007/s12648-024-03309-x","DOIUrl":null,"url":null,"abstract":"<p>The co-precipitation technique is employed for preparing ZnO/CoFe<sub>2</sub>O<sub>4</sub> composites. X-ray diffraction, Fourier Transform Infrared Spectroscopy (FTIR) and Rietveld refinement techniques is performed to investigate the composite structure obtained after annealing. The Rietveld refinement method gives information about crystalline phases present in the sample. Rietveld analysis of X-ray diffraction results reveals the presence of two phases where phase 1 is zinc oxide with hexagonal structure, whereas phase 2 is cobalt ferrite with cubic structure. XRD shows the size of crystallites for phase 1 is 43 nm, and for phase 2 is 38 nm. FTIR peaks centered at 440–515 cm<sup>−1</sup> corresponds to M–O stretching vibrations. Dielectric properties such as ε′, ε″, Tanδ, conductivity, and electric modulus of the sample have been measured at temperature 30–300 °C and the frequency range is 1–10<sup>7</sup> Hz. Dielectric parameters show dependence on frequency and temperature as well as on concentration and temperature used for synthesis of samples. Synthesized sample at temperature 400 °C and concentration 1:1 shows highest value of ε′ i.e., above 1000. To study magnetic properties VSM characterization is used. High value of ε′, Tan δ and remarkable low value of conductivity (high resistivity), retentivity (0.01–2.17 emu/g) and coercivity (34.8–213 Oe) indicate its application in high frequency devices.</p>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Studies of the co-precipitation method-synthesized ZnO/CoFe2O4 nanocomposites structural, dielectric and magnetic characteristics for high-frequency application\",\"authors\":\"J. Saini, S. Rohilla, R. Patwa, S. Sunder\",\"doi\":\"10.1007/s12648-024-03309-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The co-precipitation technique is employed for preparing ZnO/CoFe<sub>2</sub>O<sub>4</sub> composites. X-ray diffraction, Fourier Transform Infrared Spectroscopy (FTIR) and Rietveld refinement techniques is performed to investigate the composite structure obtained after annealing. The Rietveld refinement method gives information about crystalline phases present in the sample. Rietveld analysis of X-ray diffraction results reveals the presence of two phases where phase 1 is zinc oxide with hexagonal structure, whereas phase 2 is cobalt ferrite with cubic structure. XRD shows the size of crystallites for phase 1 is 43 nm, and for phase 2 is 38 nm. FTIR peaks centered at 440–515 cm<sup>−1</sup> corresponds to M–O stretching vibrations. Dielectric properties such as ε′, ε″, Tanδ, conductivity, and electric modulus of the sample have been measured at temperature 30–300 °C and the frequency range is 1–10<sup>7</sup> Hz. Dielectric parameters show dependence on frequency and temperature as well as on concentration and temperature used for synthesis of samples. Synthesized sample at temperature 400 °C and concentration 1:1 shows highest value of ε′ i.e., above 1000. To study magnetic properties VSM characterization is used. High value of ε′, Tan δ and remarkable low value of conductivity (high resistivity), retentivity (0.01–2.17 emu/g) and coercivity (34.8–213 Oe) indicate its application in high frequency devices.</p>\",\"PeriodicalId\":584,\"journal\":{\"name\":\"Indian Journal of Physics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2024-06-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Indian Journal of Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1007/s12648-024-03309-x\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Indian Journal of Physics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1007/s12648-024-03309-x","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
Studies of the co-precipitation method-synthesized ZnO/CoFe2O4 nanocomposites structural, dielectric and magnetic characteristics for high-frequency application
The co-precipitation technique is employed for preparing ZnO/CoFe2O4 composites. X-ray diffraction, Fourier Transform Infrared Spectroscopy (FTIR) and Rietveld refinement techniques is performed to investigate the composite structure obtained after annealing. The Rietveld refinement method gives information about crystalline phases present in the sample. Rietveld analysis of X-ray diffraction results reveals the presence of two phases where phase 1 is zinc oxide with hexagonal structure, whereas phase 2 is cobalt ferrite with cubic structure. XRD shows the size of crystallites for phase 1 is 43 nm, and for phase 2 is 38 nm. FTIR peaks centered at 440–515 cm−1 corresponds to M–O stretching vibrations. Dielectric properties such as ε′, ε″, Tanδ, conductivity, and electric modulus of the sample have been measured at temperature 30–300 °C and the frequency range is 1–107 Hz. Dielectric parameters show dependence on frequency and temperature as well as on concentration and temperature used for synthesis of samples. Synthesized sample at temperature 400 °C and concentration 1:1 shows highest value of ε′ i.e., above 1000. To study magnetic properties VSM characterization is used. High value of ε′, Tan δ and remarkable low value of conductivity (high resistivity), retentivity (0.01–2.17 emu/g) and coercivity (34.8–213 Oe) indicate its application in high frequency devices.
期刊介绍:
Indian Journal of Physics is a monthly research journal in English published by the Indian Association for the Cultivation of Sciences in collaboration with the Indian Physical Society. The journal publishes refereed papers covering current research in Physics in the following category: Astrophysics, Atmospheric and Space physics; Atomic & Molecular Physics; Biophysics; Condensed Matter & Materials Physics; General & Interdisciplinary Physics; Nonlinear dynamics & Complex Systems; Nuclear Physics; Optics and Spectroscopy; Particle Physics; Plasma Physics; Relativity & Cosmology; Statistical Physics.