H. Basma, W. Abdeen, A. El-Tahan, E. El-Maghraby, A. Khalaf
{"title":"SmBa2Cu3O7-δ / ZnFe2O4超导复合材料的研究","authors":"H. Basma, W. Abdeen, A. El-Tahan, E. El-Maghraby, A. Khalaf","doi":"10.54729/2959-331x.1024","DOIUrl":null,"url":null,"abstract":"SmBa2Cu3O7-δ /(ZnFe2O4)x superconducting composites with 0.00 ≤ x ≤ 0.20 wt% were prepared by the usual solid-state reaction method. The prepared samples were investigated using X-ray powder diffraction (XRD) at room temperature and electron paramagnetic resonance (EPR) measurements in the temperature range (100-295 K). It is found that EPR spectra are dominated by an anisotropic Cu2+ EPR pattern. Moreover, the EPR spectral intensity increases as the temperature decrease from room temperature down to 100 K. The number of spins (N) participating in EPR resonance, the activation energy (Ea), the paramagnetic susceptibility (c) and the effective magnetic moment (μeff) are calculated as a function of both nanosized ZnFe2O4 addition and temperature. The results are interpreted in terms of localized Cu2+ ions from non-superconducting impurity phases and confirmed by magnetization-field (M-H) hysteresis measurements.","PeriodicalId":124185,"journal":{"name":"BAU Journal - Science and Technology","volume":"49 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Studies of SmBa2Cu3O7-δ / ZnFe2O4 Superconducting Composites\",\"authors\":\"H. Basma, W. Abdeen, A. El-Tahan, E. El-Maghraby, A. Khalaf\",\"doi\":\"10.54729/2959-331x.1024\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"SmBa2Cu3O7-δ /(ZnFe2O4)x superconducting composites with 0.00 ≤ x ≤ 0.20 wt% were prepared by the usual solid-state reaction method. The prepared samples were investigated using X-ray powder diffraction (XRD) at room temperature and electron paramagnetic resonance (EPR) measurements in the temperature range (100-295 K). It is found that EPR spectra are dominated by an anisotropic Cu2+ EPR pattern. Moreover, the EPR spectral intensity increases as the temperature decrease from room temperature down to 100 K. The number of spins (N) participating in EPR resonance, the activation energy (Ea), the paramagnetic susceptibility (c) and the effective magnetic moment (μeff) are calculated as a function of both nanosized ZnFe2O4 addition and temperature. The results are interpreted in terms of localized Cu2+ ions from non-superconducting impurity phases and confirmed by magnetization-field (M-H) hysteresis measurements.\",\"PeriodicalId\":124185,\"journal\":{\"name\":\"BAU Journal - Science and Technology\",\"volume\":\"49 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-06-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"BAU Journal - Science and Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.54729/2959-331x.1024\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"BAU Journal - Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.54729/2959-331x.1024","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Studies of SmBa2Cu3O7-δ / ZnFe2O4 Superconducting Composites
SmBa2Cu3O7-δ /(ZnFe2O4)x superconducting composites with 0.00 ≤ x ≤ 0.20 wt% were prepared by the usual solid-state reaction method. The prepared samples were investigated using X-ray powder diffraction (XRD) at room temperature and electron paramagnetic resonance (EPR) measurements in the temperature range (100-295 K). It is found that EPR spectra are dominated by an anisotropic Cu2+ EPR pattern. Moreover, the EPR spectral intensity increases as the temperature decrease from room temperature down to 100 K. The number of spins (N) participating in EPR resonance, the activation energy (Ea), the paramagnetic susceptibility (c) and the effective magnetic moment (μeff) are calculated as a function of both nanosized ZnFe2O4 addition and temperature. The results are interpreted in terms of localized Cu2+ ions from non-superconducting impurity phases and confirmed by magnetization-field (M-H) hysteresis measurements.
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